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depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
SDE Feature Class - depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
FGDC, ESRI Metadata
DescriptionGraphicSpatialData StructureData QualityData SourceData DistributionMetadata
+ Resource Description
Citation
Information used to reference the data.
Title: depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
Publisher: State of Connecticut, Department of Environmental Protection
Publication date: 19990101
Edition: 20110225
Data type: vector digital data
Description
A characterization of the data, including its intended use and limitations.
Abstract:
Surface Water Quality Classifications is a line and a polygon feature-based layer compiled at 1:24,000 scale that includes water quality classification information for surface waters for all areas of the State of Connecticut. The Surface Water Quality Classifications and the Ground Water Quality Classifications are usually presented together as a depiction of water quality classifications in Connecticut. Water Quality Classifications, based on the adopted Water Quality Standards, establish designated uses for surface and ground waters and identify the criteria necessary to support those uses. This edition of the Surface Water Quality Classifications is based on the Water Quality Standards adopted on February 25, 2011. 

Surface Water means the waters of Long Island Sound, its harbors, embayments, tidal wetlands and creeks; rivers and streams, brooks, waterways, lakes, ponds, marshes, swamps, bogs, federal jurisdictional wetlands, and other natural or artificial, public or private, vernal or intermittent bodies of water, excluding groundwater. The surface waters includes the coastal waters as defined by Section 22a-93 of the Connecticut General Statutes and means those waters of Long Island Sound and its harbors, embayments, tidal rivers, streams and creeks, which contain a salinity concentration of at least five hundred parts per million under the low flow stream conditions as established by the Commissioner of the Department of Environmental Protection. The Surface Water Quality Classes are AA, A, B, SA and SB. All surface waters not otherwise classified are considered as Class A if they are in Class GA Ground Water Quality Classifications areas. Class AA designated uses are: existing or proposed drinking water, fish and wildlife habitat, recreational use (maybe restricted), agricultural and industrial supply. Class A designated uses are: potential drinking water, fish and wildlife habitat, recreational use, agricultural and industrial supply. Class B designated uses are: fish and wildlife habitat, recreational use, agricultural and industrial supply and other legitimate uses including navigation. Class B* surface water is a subset of Class B waters and is identical in all ways to the designated uses, criteria and standards for Class B waters except for the restriction on direct discharges. Coastal water and marine classifications are SA and SB. Class SA designated uses are:  marine fish, shellfish and wildlife habitat, shellfish harvesting for direct human consumption, recreation and other legitimate uses including navigation. Class SB designated uses are: marine fish, shellfish and wildlife habitat, shellfish harvesting for transfer to approved areas for purification prior to human consumption, recreation and other legitimate uses including navigation. 

There are three elements that make up the Water Quality Standards which is an important element in Connecticut's clean water program. The first of these is the Standards themselves. The Standards set an overall policy for management of water quality in accordance with the directive of Section 22a-426 of the Connecticut General Statutes. The policies can be simply summarized by saying that the Department of Environmental Protection shall: Protect surface and ground waters from degradation, Segregate waters used for drinking from those that play a role in waste assimilation, Restore surface waters that have been used for waste assimilation to conditions suitable for fishing and swimming, Restore degraded ground water to protect existing and designated uses, Provide a framework for establishing priorities for pollution abatement and State funding for clean up, Adopt standards that promote the State's economy in harmony with the environment. The second element is the Criteria, the descriptive and numerical standards that describe the allowable parameters and goals for the various water quality classifications. The final element is the Classification Maps which identify the relationship between designated uses and the applicable Standards and Criteria for each class of surface and ground water. Although federal law requires adoption of Water Quality Standards for surface waters, Water Quality Standards for ground waters are not subject to federal review and approval. Connecticut's Standards recognize that surface and ground waters are interrelated and address the issue of competing use of ground waters for drinking and for waste water assimilation. These Standards specifically identify ground water quality goals, designated uses and those measures necessary for protection of public and private drinking water supplies; the principal use of Connecticut ground waters. These three elements comprise the Water Quality Standards and are adopted using the public participation procedures contained in Section 22a-426 of the Connecticut General Statutes. The Standards, Criteria and Maps are reviewed and revised roughly every three years. Any change is considered a revision requiring public participation. The public participation process consists of public meetings held at various locations around the State, notification of all chief elected officials, notice in the Connecticut Law Journal and a public hearing. The Classification Maps are the subject of separate public hearings which are held for the adoption of the map covering each major drainage basin in the State. The Water Quality Standards and Criteria documents are available on the DEP website, www.ct.gov/dep. 

The Surface Water Quality Classifications is a line and polygon feature-based layer is based primarily on the Adopted Water Quality Classifications Map Sheets. The map sheets were hand-drawn at 1:50,000-scale in ink on Mylar which had been underprinted with a USGS topographic map base. The information collected and compiled by major drainage basin from 1986 to 1997. Ground Water Quality Classifications are defined separately in a data layer comprised of polygon features. The Ground and Surface Water Quality Classifications do not represent conditions at any one particular point in time. During the conversion from a manually maintained to a digitally maintained statewide data layer the Housatonic River and Southwest Coastal Basins information was updated.

A revision to the Water Quality Standards adopted February 25, 2011.  These revisions included eliminating surface water quality classes C, D, SC, SD and all the two tiered classifications.  The two tiered classifications included a classification for the present condition and a second classification for the designated use.  All the tiered classifications were changed to the designated use classification.  For example, classes B/A and C/A  were changed to class A.  The geographic extent of each the classification was not changed.  The publication date of the digital data reflects the official adoption date of the most recent Water Quality Classifications. Within the data layer the adoption dates are: Housatonic and Southwest Basins - March 1999, Connecticut and South Central Basins - February 1993, Thames and Southeast Basins - December 1986. Ground water quality classifications may be separately from the surface water quality classifications under specific circumstances. This data is updated.
Purpose:
Surface Water Quality Classification is 1:24,000-scale data. It depicts the location of water quality classifications for surface waters in Connecticut. Use this data layer to show the surface water quality classifications or to spatially query information from other data layers that occurs within the surface water quality classifications areas. Use this data layer with other 1:24,000-scale map data such as Ground Water Quality Classifications, Aquifer Protection Areas, Hydrography and other base map data layers. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.)
Supplemental information:
Additional information on Water Quality Standards and Classification is available on the DEP website at www.ct.gov/dep/wqsc.
Dataset credit:
The 1:50,000-scale Adopted Water Quality Classifications Map Sheets were drafted and maintained by Carol Smith, a cartographer with the State of Connecticut, Department of Environmental Protection.
Language of dataset: en
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: State of Connecticut, Department of Environmental Protection
Person: Robert Hust
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Data Type
How the data are represented, formatted and maintained by the data producing organization.
File or table name: depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
Data type: vector digital data
Data format: SDE Feature Class
Native dataset environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.6.1500
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Beginning date: 1986
Ending date: 2011
Currentness reference:
publication date
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: Irregular
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: water quality, surface water, coastal water, classification
Keyword thesaurus: none
Place:
Keywords: Connecticut, CT
Keyword thesaurus: none
Place:
Keywords: United States of America, USA
Keyword thesaurus: U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
None. The data is in the public domain and may be redistributed.
Use constraints:
No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet). Although this data set  has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials.  The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Department of Environmental Protection as the source for this information.
+ Graphic Example
Browse Graphic
Graphic illustration of the data.
Browse graphic 1
Open - Full view of Surface Water Quality Classification line and polygon features.
Graphic Image

Browse graphic 2
Open - Detail view of Surface Water Quality Classification line and polygon features.
Graphic Image

Browse graphic 3
Open - Detail view of Surface Water Quality Classification line and polygon features with orthophotography displayed in background.
Graphic Image

Browse graphic 4
Open - Detail view of Surface Water Quality Classification and Ground Water Quality Classification shown together.
Graphic Image

Browse graphic 5
Open - Detail view of Surface Water Quality Classification and Ground Water Quality Classification shown together with orthophotography displayed in the background.
Graphic Image
+ Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Projected coordinate system:
Name: NAD 1983 StatePlane Connecticut FIPS 0600 Feet
Map units: survey feet
Geographic coordinate system:
Name: GCS North American 1983
Coordinate System Details
Map projection
Map projection name: Lambert Conformal Conic
Standard parallel: 41.200000
Standard parallel: 41.866667
Longitude of central meridian: -72.750000
Latitude of projection origin: 40.833333
False easting: 999999.999996
False northing: 499999.999998
Planar Coordinate Information
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.000250
Ordinate resolution: 0.000250
Planar distance units: survey feet
Geodetic model
Horizontal datum name: North American Datum of 1983
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137.000000
Denominator of flattening ratio: 298.257222
Vertical Coordinate System
Reference system from which vertical distances (altitudes or depths) are measured.
Altitude system definition:
Altitude resolution: 1.000000
Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Projected or local coordinates
NAD 1983 StatePlane Connecticut FIPS 0600 Feet
BoundaryCoordinate
Left731994.625000 (survey feet)
Right1263040.750000 (survey feet)
Top943291.563000 (survey feet)
Bottom544018.813000 (survey feet)
In Unprojected coordinates (geographic)
GCS North American 1983
BoundaryCoordinate
West-73.736673 (longitude)
East-71.781603 (longitude)
North42.049902 (latitude)
South40.950016 (latitude)
+ Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Entity and attribute overview:
Includes Surface Water Quality Classifications for surface waters of Connecticut. Information encoded about these features includes the classification information, standard cartographic symbology classification schemes for features and labels, and guidance for labeling. Use WQCLASSA and WQCLASSP attributes to uniquely identify features. Use the AV_LEGEND attributes to symbolize features by water quality classifications on a map. Use the HY_LEGEND attributes to symbolize features by hydrography type on a map. Use the Annotation.surf to label the water quality classifications features on a map. To label features without using annotation, use the LABEL_FLG attributes to decide whether or not to label a feature and use the WQCLASSA and WQCLASSP attributes for the label.
Direct spatial reference method: Vector
Attributes of depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
Detailed descriptions of entity type, attributes, and attribute values for the data.
Name: depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
Type of object: Feature Class
Geometry type: Polygon
Number of records: 20123
Description:
Surface Water Quality Classifications represented as polygon features. Surface water polygon features are double-line river or streams and lakes or ponds from the Hydrography. Water quality classifications are applied to the surface water polygon features. The polygon attribute field WQCLASSP contains the surface water quality classes AA, A, B,  B*, SA, and SB.  All the classes are aggregated and symbolized by using the attribute field AV_LEGEND. Most surface waters are classified A and are symbolized on maps by shading but are not labeled unless they are the outlet of a Class GAA Ground Water Quality Classifications area. Surface waters inside of Class GAA or Class GAAs Ground Water Quality Classifications areas are considered Class AA and are shaded but are not labeled except for the final water features just prior to exiting the Class GAA  or Class GAAs Ground Water Quality Classifications areas. To label features, use LABEL_FLG = Y to select features for labeling and use the WQCLASSP attributes for the label.
Source:
State of Connecticut, Department of Environmental Protection
Attributes
OBJECTID
Definition:
Internal feature number.
Alias: OBJECTID Type: OID Width: 4 Precision: 10 Scale: 0
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
SHAPE
Definition:
Feature geometry.
Alias: SHAPE Type: Geometry Width: 4 Precision: 0 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
AV_LEGEND
Definition:
ArcView Legend. Text field for symbolizing polygon feature types on a map.
Alias: AV_LEGEND Type: String Width: 20 Precision: 0 Scale: 0
Attribute domain values
ValueDefinition
AA
This category includes WQCLASSP value A.
A
This category includes WQCLASSP value A.
B, B*
This category includes WQCLASSP values B and B*.
SA
This category includes WQCLASSP value SA.
SB
This category includes WQCLASSP value SB.
Attribute definition source:
State of Connecticut, Department of Environmental Protection
WQCLASSP
Definition:
Surface Water Quality Polygon Code. Text values that identify water quality feature types. The Enumerated_ Domain_Value_Definitions come from the Summary of the Water Quality Standards and Classifications.
Alias: WQCLASSP Type: String Width: 17 Precision: 0 Scale: 0
Attribute domain values
ValueDefinition
AA
Designated uses: existing or proposed drinking water supply, fish and wildlife habitat, recreational use (may be restricted,) agricultural and industrial supply. Discharge restricted to: discharges from public or private drinking water treatment systems, dredging and dewatering, emergency and clean water discharges.
A
Designated uses: potential drinking water supply; fish and wildlife habitat; recreational use; agricultural and industrial supply and other legitimate uses including navigation. Discharge restricted to: same as allowed in AA.
B
Designated uses: recreational use: fish and wildlife habitat; agricultural and industrial supply and other legitimate uses including navigation. Discharge restricted to: same as allowed in A and cooling waters, discharges from industrial and municipal wastewater treatment facilities (providing Best Available Treatment and Best Management Practices are applied), and other discharges subject to the provisions of section 22a-430 CGS.
B*
Class B* surface water is a subset of Class B waters, applicable to Candlewood Lake, and is identical in all ways to the designated uses, criteria and standards for Class B waters except for the restriction on direct discharges. Discharges may be permitted for all those allowed in Class AA, A and SA surface waters. No direct wastewater discharges are allowed other than those consistent with Class AA, A and SA surface waters.
SA
Designated uses: marine fish, shellfish and wildlife habitat, shell fish harvesting for direct human consumption, recreation and all other legitimate uses including navigation. Discharge restricted to: same as for AA or A surface waters.
SB
Designated uses: marine fish, shellfish and wildlife habitat, shellfish harvesting for transfer to approved areas for purification prior to human consumption, recreation, industrial and other legitimate uses including navigation. Discharge restricted to: same as for B surface waters.
Attribute definition source:
State of Connecticut, Department of Environmental Protection
ACREAGE
Definition:
Area of a polygon feature in acres.
Alias: ACREAGE Type: Double Width: 8 Precision: 38 Scale: 8
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
State of Connecticut, Department of Environmental Protection
LABEL_FLG
Definition:
Text field used for the decision to generate a surface water quality classification label from the line attribute field.
Alias: LABEL_FLG Type: String Width: 1 Precision: 0 Scale: 0
Attribute definition source:
State of Connecticut, Department of Environmental Protection
SHAPE.area
Alias: SHAPE.area Type: Double Width: 0 Precision: 0 Scale: 0
SHAPE.len
Alias: SHAPE.len Type: Double Width: 0 Precision: 0 Scale: 0
ESRI Feature Description
Description of spatial objects in the data using the Environmental Systems Research Institute (ESRI) terminology.
Environmental Systems Research Institute (ESRI) terms
depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 20123
Spatial index: TRUE
Linear referencing: FALSE
SDTS Feature Description
Description of point and vector spatial objects in the data using the Spatial Data Transfer Standards (SDTS) terminology.
Spatial data transfer standard (SDTS) terms
depgis.DEP.WATERQUALITYCLASS_SURFACE_POLY
Type: G-polygon
Count: 20123
+ Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
Line features conform to the following topological rules. Lines are single part. There are no duplicate lines. Lines do not self overlap. Lines do not overlap other lines. Lines intersect only at nodes, and nodes anchor the ends of all lines. Lines do not overshoot or undershoot other lines they are supposed to meet and intersect. Polygon features conform to the following topological rules. Polygons are single part. There are no duplicate polygons. Polygons do not self overlap. Polygons do not overlap other polygons. The tests of logical consistency were performed by the State of Connecticut using ESRI ArcInfo software to maintain feature topology in ArcInfo coverage format. The data is topologically clean. The ArcInfo Clean function was repeatedly used following edits to verify topology and enforce a minimum distance between vertices of 4 feet (fuzzy tolerance) and a minimum allowed overshoot length of 10 feet (dangle length). Polygon features in the Geodatabase format conform to a 2 foot cluster tolerance.
Completeness report:
The completeness of the data reflects the feature content of the data sources which include the Adopted Water Quality Classifications Mylar Map Sheets. The Surface Water Quality Classification is complete in the sense that it accurately reflects the contents of the Water Quality Classification information available at the time the State of Connecticut, Department of Environmental Protection created the data layer. This data is updated by major basin area on a rotating basis.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
The Surface Water Quality Classifications retains the feature types and information identified by the State of Connecticut, Department of Environmental Protection and obtained from the 1:50,000 scale Adopted Water Quality Classification Mylar Map Sheets. All attributes have valid values. Values are within defined domains. The accuracy test for the WQCLASSA and WQCLASSP attribute values was conducted by comparing the Surface Water Quality Classifications information presented in the source data with 1:24,000-scale check plots or interactive displays of the data on a computer graphic system. These check plot maps and computer displays depicted and labeled the Surface Water Quality Classifications features in different colors based on WQCLASSA and WQCLASSP values for comparison with the original data source. AV_LEGEND is a broad classification of Surface Water Quality Classifications features. AV_LEGEND was not manually entered. This additional field was populated by joining to a lookup data table with WQSCLASSP as the relate key field. Lookup data tables contain records that account for the unique occurrences of WQCLASSP and AV_LEGEND values in the Surface Water Quality Classifications. Surface Water Quality Classifications features were manually selected and populated with WQCLASSA, WQCLASSP and LABEL_FLG attributes values to identify and describe individual features. The attribute fields HY_LEGEND (renamed from Hydrography AV_LEGEND), HYARC_COD, HYPOLY_COD, STREAM_NO, STREAM, STREAM_NO2, LAKE_NO, LAKE, LAKE_NO2, BAY_NO, BAY_NO2, HARBOR_NO, HARBOR_NO2, SOUND_NO and SOUND_NO2 are from the Hydrography and retain their original information. Some types of hydrography features were not retained for the Surface Water Quality Classifications and therefore attributes for these types of features do not occur. Examples of unneeded hydrography features are Marshes, Closure Lines, Apparent Limit of Flats and Sand Polygons, Boundaries of Rocks. During the creation of the Surface Water Quality Classifications the line and polygon features were split or merged as needed to accommodate the water quality classifications. The attributes from the Hydrography were considered during these processes to avoid misrepresentation but the actual count of the features and attribute values will have changed when compared to the Hydrography. See Process Step 12 - Convert to GeoDatabase Feature Class format for changes to attribute fields.
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
The horizontal positional accuracy of this data is no better than the United States National Map Accuracy Standards for 1:24,000 scale maps. According to this standard, not more than 10 percent of the locations tested are to be in error by more than 1/50 inch (40 feet) measured on the publication scale of a USGS 7.5 minute topographic quadrangle map. Feature locations were created by using features from the hydrography layer based on USGS 7.5 minute topographic quadrangle DLG data and from screen-digitized lines interpreted from features depicted on USGS 7.5 minute topographic quadrangle maps.
+ Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
Source 1 - Adopted Water Quality Classifications Mylar Map Sheets
Title: Adopted Water Quality Classifications Mylar Map Sheets
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: map
Map scale denominator: 50000
Media: stable-base material
Source contribution:
This data source provided a visual record of the ground water classification features and the classification applied to each feature.
Beginning date: 1985
Ending date: 1993
Currentness reference:
publication date
Source 2 - Water Quality Classifications Mylar Quadrangles
Title: Water Quality Classifications Mylar Quadrangles for Connecticut, South Central Coast, Thames, and Southeast Coast
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: map
Map scale denominator: 24000
Media: stable-base material
Source contribution:
This data source provided the ground water classification features and the classification applied to each feature for digitizing.
Beginning date: 1986
Ending date: 1993
Currentness reference:
calendar date
Source 3 - USGS Topographic Quadrangles
Title: USGS 7.5 Minute Topographic Quadrangles
Originators: U.S. Geological Survey, National Mapping Program
Publisher: State of Connecticut
Publication date: 1969-1984
Data type: map
Map scale denominator: 24000
Media: paper
Source contribution:
This data source provided the base map and the registration points for digitizing the ground water classification features.
Beginning date: 1969
Ending date: 1984
Currentness reference:
publication date
Source 4 - Draft Water Quality Classifications Quadrangles
Title: Water Quality Classifications Manuscripts for Housatonic, Southwest Coastal and Hudson Basins
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: map
Map scale denominator: 24000
Media: paper
Source contribution:
This data source provided the ground water classification features and the classification applied to each feature for the Housatonic, Southwest Coastal and Hudson basins for digitizing.
Date: 1985
Currentness reference:
calendar date
Source 5 - Public Water Supply Wells
Title: Public Water Supply Wells
Originators: State of Connecticut, Department of Public Health
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided the point locations of Public Water Supply Wells which were buffered to a radius of 500 feet to create areas representing the areas of contribution.
Date: 1995
Currentness reference:
publication date
Source 6 - Public Water Supply Well Buffers
Title: Public Water Supply Well Buffers
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided polygon areas representing the areas of contribution to the public water supply by buffering the point locations of Public Water Supply Wells to a radius of 500 feet.
Date: 1995
Currentness reference:
calendar date
Source 7 - Base Map data layers
Title: Base Map Data Layers
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
These data layers provided line features to build the polygons where the Ground Water Quality Classifications features were coincident with the 1:24,000-scale base map. Included are 1:24,000-scale Hydrography, Roads and Trails, Town Boundaries and Railroads.
Date: 1995
Currentness reference:
publication date
Source 8 - Drainage Basins
Title: Drainage Basins
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided line features to build the polygons where the Ground Water Quality Classifications features were coincident with the 1:24,000-scale natural drainage basins published by the State of Connecticut, Department of Environmental Protection.
Date: 1995
Currentness reference:
publication date
Source 9 - Leachate and Wastewater Discharge Sources
Title: Leachate and Wastewater Discharge Sources
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 50000
Media: disc
Source contribution:
This data source is a point data layer of surface and groundwater discharges that have received a wastewater discharge permit from the state, are active or historic (no longer active) waste disposal sites, salt storage, or are locations of spills, leaks, deposits or discharges of a variety of liquid or solid wastes. This data provided a guide for the delineation and attribution of Water Quality Classifications areas that were updated.
Date: 1995
Currentness reference:
publication date
Source 10 - Tables for Leachate and Wastewater Discharge Sources
Title: Data tables for Leachate and Wastewater Discharge Sources
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: tabular digital data
Media: disc
Source contribution:
This data source provided additional tabular information about the Leachate and Wastewater Discharge Sources. It is published as booklet to accompany Leachate and Wastewater Discharge Sources maps.
Date: 1995
Currentness reference:
calendar date
Source 11 - Shellfish Area Classifications Maps
Title: Shellfish Area Classifications
Originators: State of Connecticut, Department of Agriculture, Bureau of Aquaculture
Publisher: State of Connecticut
Publication date: 1993 - 2005
Data type: map
Map scale denominator: Varies
Media: paper
Source contribution:
This source provided guidance for the delineation and attribution of Water Quality Classifications areas along the coast. This source is the classifications of shellfishing growing waters for  Connecticut shoreline towns. The shellfishing areas are delineated and classified by the Connecticut Department of Agriculture, Bureau of Aquaculture.
Beginning date: 1993
Ending date: 1995
Currentness reference:
publication date
Source 12 - Water Quality Classifications Maps for DEP Staff Review
Title: Water Quality Classifications Maps for DEP Staff Review
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Data type: map
Map scale denominator: 24000
Media: disc
Source contribution:
This data source provided maps of  Water Quality Classifications data, Leachate and Wastewater Discharge Sources data, Base map data and Drainage Basin data covering the Housatonic River and Southwest Coastal Basins for the purpose of in-house reviewing and updating of the Water Quality Classifications by DEP staff.
Date: 1995
Currentness reference:
calendar date
Source 13 - Water Quality Classifications Maps for Town Review
Title: Water Quality Classifications for Town Review
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: map
Map scale denominator: 24000
Media: disc
Source contribution:
This source provided town-based maps of the Water Quality Classifications data, Base Map data layers, Drainage Basin data and Leachate and Wastewater Discharge Sources data  for the Housatonic River and Southwest Coastal Basins for the purpose of reviewing Water Quality Classifications by town officials.
Date: 1995
Currentness reference:
publication date
Source 14 - Water Quality Classifications Maps for Public Hearing
Title: Draft Water Quality Classifications Town Maps
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 1995
Data type: map
Map scale denominator: 24000
Media: disc
Source contribution:
This source provided the updated Water Quality Classifications data on town-based maps for the Housatonic River and Southwest Coastal Basins for use during the Public Hearing phase of the Water Quality Classifications Maps adoption process.
Date: 1995
Currentness reference:
publication date
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Source 16 - Ground Water Quality Classifications
Title: Ground Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2005
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all ground water quality classifications features separated from the statewide water quality classifications data layer and with the hydrography polygon features removed (erased). Since initial publication in 2000, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to add and modify features. Consequently, over a period of years, different copies of this data layer were produced. Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced. The Ground Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 19 - WaterQualityClass_Ground_Master
Title: WaterQualityClass_Ground_Master
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format ground water classification datalayer. Includes all ground water classifications polygon features except public water supply well buffered areas or final aquifer protection areas. Includes temporary (and potentially inaccurate) ground water classifications under surface waters. This layer forms the base for the derived WaterQualityClass_Ground datalayer.
Currentness reference:
publication date
Source 20 - WaterQualityClass_Surface_Poly
Title: WaterQualityClass_Surface_Poly
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody area features such as lakes, ponds, bays, harbors, sounds and rivers and streams large enough to be represented as polygons at 1:24,000 scale.
Currentness reference:
publication date
Source 21 - WaterQualityClass_Surface_Line
Title: WaterQualityClass_Surface_Line
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody line features such as rivers and streams represented as lines at 1:24,000 scale.
Currentness reference:
publication date
Source 22 - Public Water Supply Well Buffer 500 Ft
Title: Public Water Supply Well Buffer 500 Ft
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format datalayer of 500 foot buffer areas around Public Water Supply Wells. These buffers are ground water classification areas and are added to the WaterQualityClass_Ground_Master datalayer during creation of the final WaterQualityClass_Ground datalayer. These buffered areas are kept separate for easier maintenance of the ground water classifications data.
Source 23 - WaterQualityClass_Ground
Title: WaterQualityClass_Ground
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format of ground water quality classification as polygon features. It includes the 500 ft buffered areas around public water supply wells and final aquifer protection areas (as this data is adopted). It excludes ground water classifications under surface waterbodies.
Currentness reference:
publication date
Source 24 - WaterQualityClass_Ground.shp
Title: WaterQualityClass_Ground.shp
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2006
Data type: vector digital data
Data location: http://www.ct.gov/dep
Map scale denominator: 24,000
Media: disc
Source contribution:
Statewide shapefile format of ground water quality classification as polygon features. It includes the 500 ft buffered areas around public water supply wells and final aquifer protection areas (as this data is adopted). It excludes ground water classifications under surface waterbodies.
Currentness reference:
publication date
Source 25 - WaterQualityClass_Surface_Poly.shp
Title: WaterQualityClass_Surface_Poly.shp
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2006
Data type: vector digital data
Data location: http://www.ct.gov/dep
Map scale denominator: 24,000
Media: disc
Source contribution:
Statewide shapefile format of surface water quality classification as polygon features.
Currentness reference:
publication date
Source 26 - WaterQualityClass_Surface_Line.shp
Title: WaterQualityClass_Surface_Line.shp
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2006
Data type: vector digital data
Data location: http://www.ct.gov/dep
Map scale denominator: 24,000
Media: disc
Source contribution:
Statewide shapefile format of surface water quality classification as line features.
Currentness reference:
publication date
Source 18 - Surface_Water_Quality_Classifications_Polygon.shp
Title: Surface Water Quality Classifications Polygon
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Data location: http://www.ct.gov/dep
Map scale denominator: 24000
Media: disc
Source contribution:
Includes all polygon features from the Surface Water Quality Classifications  where the AV_LEGEND attribute was not blank (AV_LEGEND <> " "). This criterion only includes hydrography features for lakes, ponds, rivers, streams, dams, and others that have a surface water quality classification.  It excludes polygon features from the ArcInfo coverage, marshes, inundation areas or  represent areas of land completely enclosed by water features, that do not have surface water quality classifications . Surface_Water_Quality_Classifications_Polygon.shp is in Shapefile format.
Source 27 - WaterQualityClass_Surface_Line
Title: WaterQualityClass_Surface_Line
Originators: State of Connecticut, Department of Environmental Protection
Edition: 20110225
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody line features such as rivers and streams represented as lines at 1:24,000 scale.
Source 28 - WaterQualityClass_Surface_Poly
Title: WaterQualityClass_Surface_Poly
Originators: State of Connecticut, Department of Environmental Protection
Edition: 20110225
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody area features such as lakes, ponds, bays, harbors, sounds and rivers and streams large enough to be represented as polygons at 1:24,000 scale.
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
Process Overview - The original Water Quality Classifications mapping (e.g. Source 1 Adopted Water Quality Classifications Map Sheets) contain both Surface Water and Ground Water Classifications. Both surface water and ground water features were processed as this information was recreated in a digital form as the Source 15 Water Quality Classifications data layer. The Water Quality Classifications data layer was maintain with both surface and ground  water features until 2000 when the data model was changed to separate Surface Water Quality Classifications and Ground Water Quality Classifications. Process steps up to this time refer to both the surface and ground water features.
				
Process Step 2
Process description:
Feature digitizing and attribution (using tablet digitizing and feature selection methods) - Source 2 Water Quality Classifications Mylar Quadrangles and Source 4 Draft Water Quality Classifications Quadrangles depict both surface water and ground water quality classifications. From these two sources line features (polygons began as outlines) for all classifications were captured and attributed as work progressed quadrangle by quadrangle in the creation of  Source 15 Water Quality Classifications. Using ESRI ArcInfo software, features were tablet digitized by registering the source map to the digitizing tablet and using the crosshairs of the digitizer's mouse to manually capture the geometry (location) of features drafted on the map. The source map was registered to the digitizing tablet by first digitizing (entering) the locations of four corner registration points shown on the USGS 7.5 minute topographic quadrangle maps. ArcInfo software compared the values of the digitized coordinates with the actual (true) values for the quadrangle corner (tic) features. The Root Mean Square (RMS) error generated by the ArcInfo software indicated the amount of error involved in transforming coordinates from the registered map to the digital layer.  RMS errors higher than 0.004 were not acceptable and required re-registering the source map by digitizing the tic locations again. The source maps were positioned on top of the USGS Topographic Quadrangles for a best fit. After correct registration, individual features that were not coincident with existing 1:24,000-scale Base Map data layers (hydrography, roads and trails, railroads, town boundaries) or 1:24,000-scale Drainage Basins were manually digitized off Source 2 or Source 4 and assigned WQCLASSA values for line features, including outlines of ground water quality classifications. Lines were not digitized for ground water quality Class GA. Where necessary, additional minor edits to feature geometry were manually digitized on the screen (heads-up digitizing) at display scales greater than 1:24,000. Using ESRI ArcInfo software, features appearing in and coincident with the existing 1:24,000-scale Base Map data layers (hydrography, roads and trails, railroads, town boundaries) or 1:24,000-scale Drainage Basins were manually selected, copied and used as the basis for features in the Water Quality Classifications. Hydrography features were used for surface water quality classifications features. Only features classified other than A or SA were taken from Hydrography, except for Class A waters emanating from GAA (public water supply watershed) areas. Feature geometry (location) required partial editing and adjustment to match information on Source 1 Adopted Water Quality Classifications Mylar Maps, Source 2 and Source 4. Using ESRI ArcInfo software, the Water Quality Classifications was built as both line features and  polygon features. The polygons were checked and edited to follow the topology rules. Label points were automatically added. Polygon features were assigned WQCLASSP attribute values based on information in Source 1, Source 2 and Source 4. Ground water quality Class GA was not designated since no polygon features for it were digitized directly in the Water Quality Classifications. Any ground water areas not otherwise classified are assumed to be Class GA. Most surface water quality Class A and SA were not designated since only certain instances of these features were created directly in the Water Quality Classifications. Most surface water quality Class A and  SA features were represented by those features in the 1:24,000-scale Hydrography that were not incorporated in the Water Quality Classifications. Feature location and attribute accuracy was visually checked and inspected by symbolizing and labeling features according to attribute value on the computer screen and on hard copy paper maps, and comparing this information to the original source data. These check plot maps were printed at the same scale as the Water Quality Classifications Mylar Quadrangles in order to visually inspect digitizing quality and the assignment of attribute values.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg, Carol Smith
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 1995
Data Source used
Source 1 - Adopted Water Quality Classifications Mylar Map Sheets
Title: Adopted Water Quality Classifications Mylar Map Sheets
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: map
Map scale denominator: 50000
Media: stable-base material
Source contribution:
This data source provided a visual record of the ground water classification features and the classification applied to each feature.
Beginning date: 1985
Ending date: 1993
Currentness reference:
publication date
Source 2 - Water Quality Classifications Mylar Quadrangles
Title: Water Quality Classifications Mylar Quadrangles for Connecticut, South Central Coast, Thames, and Southeast Coast
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: map
Map scale denominator: 24000
Media: stable-base material
Source contribution:
This data source provided the ground water classification features and the classification applied to each feature for digitizing.
Beginning date: 1986
Ending date: 1993
Currentness reference:
calendar date
Source 7 - Base Map data layers
Title: Base Map Data Layers
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
These data layers provided line features to build the polygons where the Ground Water Quality Classifications features were coincident with the 1:24,000-scale base map. Included are 1:24,000-scale Hydrography, Roads and Trails, Town Boundaries and Railroads.
Date: 1995
Currentness reference:
publication date
Source 8 - Drainage Basins
Title: Drainage Basins
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided line features to build the polygons where the Ground Water Quality Classifications features were coincident with the 1:24,000-scale natural drainage basins published by the State of Connecticut, Department of Environmental Protection.
Date: 1995
Currentness reference:
publication date
Source 4 - Draft Water Quality Classifications Quadrangles
Title: Water Quality Classifications Manuscripts for Housatonic, Southwest Coastal and Hudson Basins
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: map
Map scale denominator: 24000
Media: paper
Source contribution:
This data source provided the ground water classification features and the classification applied to each feature for the Housatonic, Southwest Coastal and Hudson basins for digitizing.
Date: 1985
Currentness reference:
calendar date
Data Source produced
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Process Step 3
Process description:
Feature creation and attribution  - Using ESRI ArcInfo software,  the Public Water Supply Wells were buffered to a radius of 500 feet to create areas that represent areas of contribution. Features were assigned WQCLASSP attribute values based on information in the Adopted Water Quality Classifications Mylar Map Sheets.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 1995
Data Source used
Source 5 - Public Water Supply Wells
Title: Public Water Supply Wells
Originators: State of Connecticut, Department of Public Health
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided the point locations of Public Water Supply Wells which were buffered to a radius of 500 feet to create areas representing the areas of contribution.
Date: 1995
Currentness reference:
publication date
Source 1 - Adopted Water Quality Classifications Mylar Map Sheets
Title: Adopted Water Quality Classifications Mylar Map Sheets
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: map
Map scale denominator: 50000
Media: stable-base material
Source contribution:
This data source provided a visual record of the ground water classification features and the classification applied to each feature.
Beginning date: 1985
Ending date: 1993
Currentness reference:
publication date
Data Source produced
Source 6 - Public Water Supply Well Buffers
Title: Public Water Supply Well Buffers
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided polygon areas representing the areas of contribution to the public water supply by buffering the point locations of Public Water Supply Wells to a radius of 500 feet.
Date: 1995
Currentness reference:
calendar date
Process Step 4
Process description:
Combining of data layers - Using ESRI ArcInfo software, the Public Water Supply Well Buffers features were added to the Water Quality Classifications using the Update method. Feature location and attribute accuracy was visually checked and inspected by symbolizing and labeling features according to attribute value both on the computer screen and on hard copy paper maps, and comparing this information to the original source data.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 1995
Data Source used
Source 6 - Public Water Supply Well Buffers
Title: Public Water Supply Well Buffers
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided polygon areas representing the areas of contribution to the public water supply by buffering the point locations of Public Water Supply Wells to a radius of 500 feet.
Date: 1995
Currentness reference:
calendar date
Source 1 - Adopted Water Quality Classifications Mylar Map Sheets
Title: Adopted Water Quality Classifications Mylar Map Sheets
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: map
Map scale denominator: 50000
Media: stable-base material
Source contribution:
This data source provided a visual record of the ground water classification features and the classification applied to each feature.
Beginning date: 1985
Ending date: 1993
Currentness reference:
publication date
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Data Source produced
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Process Step 5
Process description:
Update of  water quality in two major basins - In 1995, the DEP revised Water Quality Classifications in the Housatonic River and Southwest Coastal Basins. The source information for Water Quality Classifications for these two basins was in draft form and was compiled prior to 1986. A set of quadrangle-based maps showing the Water Quality Classifications, Leachate and Wastewater Discharge Sources, Base map data layers and Drainage Basins was prepared for review by DEP staff. The results of the staff review were compiled into a list of changes. A set of town-based maps with the Water Quality Classifications, Leachate and Wastewater Discharge Sources, Base map data layers and Drainage Basins was prepared and mailed to each town for review by town officials. The results of the town review were compiled into a list of changes. State of Connecticut, Department of Environmental Protection staff Randy May and Fred Banach conducted a review of the Water Quality Classifications based on the staff review, the town review, the Shellfish Area Classifications and their own extensive knowledge and experience of the area and the conditions. During the review notes for updates were placed on copies of  the same maps that DEP staff reviewed. Features and attributes of the Water Quality Classifications data were revised to reflect the decisions of  May and Banach. 1:24,000-scale Base Map data layers and 1:24,000-scale Drainage Basin data provided the source for coincident features and other feature changes were digitized on screen. Surface water and ground water were revised. The Surface Water Quality  Classifications are required by statute to be adopted through a public process. The Water Quality Classifications were printed on town-based maps and made available at the DEP and at a location in each town for a period of public review and comment. The maps were available at the Public Hearings held at several locations in these two major basins. Comments from the public review process were incorporated into the Water Quality Classifications data where acceptable by the DEP. After the revisions were finalized the adopted date for the Water Quality Classifications features within Housatonic River and Southwest Coastal Basins became 1997
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg, Carol Smith
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 1995
Data Source used
Source 9 - Leachate and Wastewater Discharge Sources
Title: Leachate and Wastewater Discharge Sources
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 50000
Media: disc
Source contribution:
This data source is a point data layer of surface and groundwater discharges that have received a wastewater discharge permit from the state, are active or historic (no longer active) waste disposal sites, salt storage, or are locations of spills, leaks, deposits or discharges of a variety of liquid or solid wastes. This data provided a guide for the delineation and attribution of Water Quality Classifications areas that were updated.
Date: 1995
Currentness reference:
publication date
Source 10 - Tables for Leachate and Wastewater Discharge Sources
Title: Data tables for Leachate and Wastewater Discharge Sources
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: tabular digital data
Media: disc
Source contribution:
This data source provided additional tabular information about the Leachate and Wastewater Discharge Sources. It is published as booklet to accompany Leachate and Wastewater Discharge Sources maps.
Date: 1995
Currentness reference:
calendar date
Source 11 - Shellfish Area Classifications Maps
Title: Shellfish Area Classifications
Originators: State of Connecticut, Department of Agriculture, Bureau of Aquaculture
Publisher: State of Connecticut
Publication date: 1993 - 2005
Data type: map
Map scale denominator: Varies
Media: paper
Source contribution:
This source provided guidance for the delineation and attribution of Water Quality Classifications areas along the coast. This source is the classifications of shellfishing growing waters for  Connecticut shoreline towns. The shellfishing areas are delineated and classified by the Connecticut Department of Agriculture, Bureau of Aquaculture.
Beginning date: 1993
Ending date: 1995
Currentness reference:
publication date
Source 12 - Water Quality Classifications Maps for DEP Staff Review
Title: Water Quality Classifications Maps for DEP Staff Review
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Data type: map
Map scale denominator: 24000
Media: disc
Source contribution:
This data source provided maps of  Water Quality Classifications data, Leachate and Wastewater Discharge Sources data, Base map data and Drainage Basin data covering the Housatonic River and Southwest Coastal Basins for the purpose of in-house reviewing and updating of the Water Quality Classifications by DEP staff.
Date: 1995
Currentness reference:
calendar date
Source 13 - Water Quality Classifications Maps for Town Review
Title: Water Quality Classifications for Town Review
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: map
Map scale denominator: 24000
Media: disc
Source contribution:
This source provided town-based maps of the Water Quality Classifications data, Base Map data layers, Drainage Basin data and Leachate and Wastewater Discharge Sources data  for the Housatonic River and Southwest Coastal Basins for the purpose of reviewing Water Quality Classifications by town officials.
Date: 1995
Currentness reference:
publication date
Source 14 - Water Quality Classifications Maps for Public Hearing
Title: Draft Water Quality Classifications Town Maps
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 1995
Data type: map
Map scale denominator: 24000
Media: disc
Source contribution:
This source provided the updated Water Quality Classifications data on town-based maps for the Housatonic River and Southwest Coastal Basins for use during the Public Hearing phase of the Water Quality Classifications Maps adoption process.
Date: 1995
Currentness reference:
publication date
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Data Source produced
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Process Step 6
Process description:
Federal review - The Environmental Protection Agency (EPA) conducted a review of the updated Water Quality Classifications maps for the Housatonic River and Southwest Coastal Basins in 1997. The surface water quality classifications are subject to federal review and adoption. Edits were made to the digital data for changes to the water quality maps agreed to by the EPA and the DEP. The most significant changes were made to the marine water quality classifications along the coastline of the Southwest Coastal Basin.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 1997
Data Source used
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Data Source produced
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Process Step 7
Process description:
Datum conversion - Using ESRI ArcInfo software, the Water Quality Classifications was converted from the Connecticut State Plane Coordinate System of 1927 (NAD27) to the Connecticut State Plane Coordinate System of 1983 (NAD83). The NADCON (North American Datum CONversion) data transformation was used.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 1999
Data Source used
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Data Source produced
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Process Step 8
Process description:
Data model change, data layer separation - The Water Quality Classifications data layer was separated into two data layers, one for Ground Water Quality Classifications and one for Surface Water Quality Classifications. The reasons for this change are several: the user will have the choice of displaying one or both of the classifications data layers without manipulating the data, Surface Water Quality Classifications and Ground Water Quality Classifications potentially have different user communities, Surface Water Quality Classifications has oversight by the Environmental Protection Agency, Ground Water Quality Classifications are subject to changes in classification through an application process and may change twice yearly. The separation was accomplished using ESRI ArcInfo software by eliminating the Ground Water features from a copy of the Water Quality Classifications and by eliminating the Surface Water features from a copy of the Water Quality Classifications. The Public Water Supply Wells Buffers were added to the Ground Water Quality Classifications again using the ArcInfo Update command. Each new data layer was inspected on-screen and errors in topology, pseudonodes and label errors were corrected. Printed maps at 1:24,000 scale were inspected and the data was corrected for coding errors.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 2000
Data Source used
Source 15 - Water Quality Classifications
Title: Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface and ground water classification features combined in one statewide data layer. Since initial publication in 1995, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to change data format, convert from NAD 27 to NAD 83, or add and modify features. Consequently, over the period of many years, different copies of this data layer were produced, representing various steps in the data layer development and maintenance process (metadata lineage). Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced.
Date: 1995
Source 6 - Public Water Supply Well Buffers
Title: Public Water Supply Well Buffers
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided polygon areas representing the areas of contribution to the public water supply by buffering the point locations of Public Water Supply Wells to a radius of 500 feet.
Date: 1995
Currentness reference:
calendar date
Data Source produced
Source 16 - Ground Water Quality Classifications
Title: Ground Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2005
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all ground water quality classifications features separated from the statewide water quality classifications data layer and with the hydrography polygon features removed (erased). Since initial publication in 2000, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to add and modify features. Consequently, over a period of years, different copies of this data layer were produced. Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced. The Ground Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Process Step 9
Process description:
Data model change, integration with hydrography - After the Water Quality Classifications data layer was separated into Ground Water Quality Classifications and Surface Water Quality Classifications, the Surface Water Quality Classifications needed to be fully integrated with the Hydrography. The reasons for this change are that the user can get a complete picture of water quality classifications without displaying the Hydrography and the data can be queried in a web or other GIS application. Previously, the user had to assume that water features not found in the Water Quality Classifications  were Class A and that areas not found in Ground Water Quality Classifications were Class GA. Using ESRI ArcInfo software and several processing iterations, the attributes of the Surface Water Quality Classifications were transferred to a copy of the Hydrography data. The line feature attributes and the polygon feature attributes were processed separately. Line features were split to allow the correct placement of line attributes. Polygon features were split where necessary by on-screen digitizing of closure lines to allow the correct placement of polygon attributes. The Ground Water Quality Classifications contained areas that were beneath surface waters where DEP does not classify ground water. Using ESRI ArcInfo software, the water features were isolated from the Hydrography and used with the ArcInfo Erase command to eliminate (knock out) polygon areas where water features exist in Hydrography. Both new data layers were inspected on-screen for errors in topology. Printed maps at 1:24,000 scale were inspected and the data was corrected for coding errors.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 2000
Data Source used
Source 7 - Base Map data layers
Title: Base Map Data Layers
Publisher: State of Connecticut
Publication date: 1995
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
These data layers provided line features to build the polygons where the Ground Water Quality Classifications features were coincident with the 1:24,000-scale base map. Included are 1:24,000-scale Hydrography, Roads and Trails, Town Boundaries and Railroads.
Date: 1995
Currentness reference:
publication date
Source 16 - Ground Water Quality Classifications
Title: Ground Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2005
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all ground water quality classifications features separated from the statewide water quality classifications data layer and with the hydrography polygon features removed (erased). Since initial publication in 2000, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to add and modify features. Consequently, over a period of years, different copies of this data layer were produced. Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced. The Ground Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Data Source produced
Source 16 - Ground Water Quality Classifications
Title: Ground Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2005
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all ground water quality classifications features separated from the statewide water quality classifications data layer and with the hydrography polygon features removed (erased). Since initial publication in 2000, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to add and modify features. Consequently, over a period of years, different copies of this data layer were produced. Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced. The Ground Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Process Step 10
Process description:
Attribute enhancements - WQCLASSP and WEL_LEGEND attributes were changed from storing abbreviated values in upper case to full length values in both upper and lower case.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg, Elizabeth Doran
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 2001
Data Source used
Source 16 - Ground Water Quality Classifications
Title: Ground Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2005
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all ground water quality classifications features separated from the statewide water quality classifications data layer and with the hydrography polygon features removed (erased). Since initial publication in 2000, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to add and modify features. Consequently, over a period of years, different copies of this data layer were produced. Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced. The Ground Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Data Source produced
Source 16 - Ground Water Quality Classifications
Title: Ground Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2005
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all ground water quality classifications features separated from the statewide water quality classifications data layer and with the hydrography polygon features removed (erased). Since initial publication in 2000, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to add and modify features. Consequently, over a period of years, different copies of this data layer were produced. Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced. The Ground Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Process Step 11
Process description:
Export to Shapefile Format - Converted data from ArcInfo Coverage to Shapefile format and named the shapefile Surface_Water_Quality_Classifications_Polygon.shp. Excluded the AREA, PERIMETER, WQSCLASS#, WQSCLASS-ID attributes from the Shapefile because their values are only maintained by ArcInfo software with data that is in ArcInfo Coverage format. Includes all polygon features from the Surface Water Quality Classifications where the AV_LEGEND attribute was not blank (AV_LEGEND <> " "). This criterion only includes hydrography features for lakes, ponds, rivers, streams, dams, and others that have a surface water quality classification.  It excludes polygon features from the ArcInfo coverage, marshes, inundation areas or  represent areas of land completely enclosed by water features, that do not have surface water quality classifications . Surface_Water_Quality_Classifications_Polygon.shp is in Shapefile format.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 20050428
Data Source used
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Data Source produced
Source 18 - Surface_Water_Quality_Classifications_Polygon.shp
Title: Surface Water Quality Classifications Polygon
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Data location: http://www.ct.gov/dep
Map scale denominator: 24000
Media: disc
Source contribution:
Includes all polygon features from the Surface Water Quality Classifications  where the AV_LEGEND attribute was not blank (AV_LEGEND <> " "). This criterion only includes hydrography features for lakes, ponds, rivers, streams, dams, and others that have a surface water quality classification.  It excludes polygon features from the ArcInfo coverage, marshes, inundation areas or  represent areas of land completely enclosed by water features, that do not have surface water quality classifications . Surface_Water_Quality_Classifications_Polygon.shp is in Shapefile format.
Process Step 12
Process description:
Convert to GeoDatabase Feature Class format - Water Quality Classifications datalayers were converted to geodatabase format feature classes according to the following steps: defined new Feature Class, imported the spatial reference, defined or imported the attribute definitions, loaded features from coverage, imported metadata from shapefile, edited metadata. The unpublished parent to Source 16 - Ground Water Quality Classification was converted to polygon feature class Source 19 - WaterQualityClass_Ground_Master.
Source 16 - Ground Water Quality Classification was not converted from coverage format. The equivalent  datalayer, Source 20 - WaterQualityClass_Ground, is generated through overlay techniques from Source 19 - WaterQualityClass_Ground_Master, Source 23 - Public Water Supply Well Buffers 500 Ft and Source 21 - WaterQualityClass_Surface_Poly polygon feature classes. Source 17 - Surface Water Quality Classification was converted to polygon feature class Source 21 - WaterQualityClass_Surface_Poly and to line feature class Source 22 - WaterQualityClass_Surface_Line. Source 6 - Public Water Supply Well Buffers was converted to polygon feature class Source 23 - Public Water Supply Well Buffers 500 Ft. 

Spatial Reference Properties used for Feature Classes:
Coordinate System: NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet
XY Domain MinX: 100000; MaxX: 2247483.645 XY Domain MinY: 200000; MaxY: 2347483.645
Precision: 1000

WaterQualityClass_Ground_Master feature class was reworked to eliminate the empty areas originally introduced by erasing the ground water quality layer with the surface water quality layer. The original purpose of the erasure was to eliminate ground water classifications occurring under surface waterbodies. This erasure step now occurs live during creation of the WaterQualityClass_Ground feature class derived from the WaterQualityClass_Ground_Master. To create the new WaterQualityClass_Ground_Master feature class the tools and processes available in ESRI ArcGIS 9.1 were employed. Automated and manual methods were used iteratively to eliminate "doughnut holes" and replace empty areas with appropriately attributed polygons. Where ground water polygons changed classification across waterbodies, centerlines following the waterbodies were manually digitized to form the boundary between classifications. Source 19 - WaterQualityClass_Ground_Master contains continuous Ground Water Quality polygon features, including temporary features that are fully or partially replaced during the generation of the final ground water datalayer, Source 20 - WaterQualityClass_Ground. The steps used to create Source 20 - WaterQualityClass_Ground are 1) used the ESRI ArcMap 9.1 Update tool to replace ares of Source 19 - WaterQUalityClass_Ground_Master with Source 23 - Public Water Supply Well Buffers 500 Ft 2) used the ESRI ArcMap 9.1 Erase tool to eliminate areas contained in Source 21 - WaterQualityClass_Surface_Poly from the output datalayer resulting from step 1. This method of maintaining the Ground Water Quality Classifications datalayer simplifies the process and reduces errors. Changes can be made to any of the participating datalayers or another datalayer can be introduced and a new Source 20 - WaterQualityClass_Ground can be generated. During the conversion from coverage to geodatabase format certain attribute fields were dropped from the surface water quality. The attribute field HY_LEGEND was retained for WaterQualityClass_Surface_Line, for maintenance purposes, but dropped from WaterQualityClass_Surface_Poly. The attribute fields HYARC_COD, HYPOLY_COD, STREAM_NO, STREAM, STREAM_NO2, LAKE_NO, LAKE, LAKE_NO2, BAY_NO, BAY_NO2, HARBOR_NO, HARBOR_NO2, SOUND_NO and SOUND_NO2 were dropped from WaterQualityClass_Surface_Line and WaterQualityClass_Surface_Poly.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 2006
Data Source used
Source 16 - Ground Water Quality Classifications
Title: Ground Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2005
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all ground water quality classifications features separated from the statewide water quality classifications data layer and with the hydrography polygon features removed (erased). Since initial publication in 2000, subsequent publications or editions of the data layer were generated by the State of Connecticut in order to add and modify features. Consequently, over a period of years, different copies of this data layer were produced. Changes made to the entire data layer are reflected in metadata process steps where this particular data source is cited as both the Source Used and the Source Produced. The Ground Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 17 - Surface Water Quality Classifications
Title: Surface Water Quality Classifications
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: 2000
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data source refers to all surface water quality classifications features separated from the statewide water quality classifications data layer and with additional hydrography line and polygon features added. The Surface Water Quality Classifications is in ArcInfo Coverage format.
Date: 1995
Currentness reference:
publication date
Source 6 - Public Water Supply Well Buffers
Title: Public Water Supply Well Buffers
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
This data layer provided polygon areas representing the areas of contribution to the public water supply by buffering the point locations of Public Water Supply Wells to a radius of 500 feet.
Date: 1995
Currentness reference:
calendar date
Data Source produced
Source 19 - WaterQualityClass_Ground_Master
Title: WaterQualityClass_Ground_Master
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format ground water classification datalayer. Includes all ground water classifications polygon features except public water supply well buffered areas or final aquifer protection areas. Includes temporary (and potentially inaccurate) ground water classifications under surface waters. This layer forms the base for the derived WaterQualityClass_Ground datalayer.
Currentness reference:
publication date
Source 20 - WaterQualityClass_Surface_Poly
Title: WaterQualityClass_Surface_Poly
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody area features such as lakes, ponds, bays, harbors, sounds and rivers and streams large enough to be represented as polygons at 1:24,000 scale.
Currentness reference:
publication date
Source 21 - WaterQualityClass_Surface_Line
Title: WaterQualityClass_Surface_Line
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody line features such as rivers and streams represented as lines at 1:24,000 scale.
Currentness reference:
publication date
Source 22 - Public Water Supply Well Buffer 500 Ft
Title: Public Water Supply Well Buffer 500 Ft
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format datalayer of 500 foot buffer areas around Public Water Supply Wells. These buffers are ground water classification areas and are added to the WaterQualityClass_Ground_Master datalayer during creation of the final WaterQualityClass_Ground datalayer. These buffered areas are kept separate for easier maintenance of the ground water classifications data.
Source 23 - WaterQualityClass_Ground
Title: WaterQualityClass_Ground
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format of ground water quality classification as polygon features. It includes the 500 ft buffered areas around public water supply wells and final aquifer protection areas (as this data is adopted). It excludes ground water classifications under surface waterbodies.
Currentness reference:
publication date
Process Step 13
Process description:
Export to Shapefile Format - Converted data from Geodatabase to Shapefile format and named the shapefiles after the geodatabase version. Excluded the SHAPE_Area and SHAPE_Length fields because their values are not maintained by the shapefile format. Excluded HY_LEGEND attribute field from WaterQualityClass_Surface_Line.shp. WaterQualityClass_Ground.shp includes all polygon features from WaterQualityClass_Ground. WaterQualityClass_Surface_Poly.shp includes all polygon features from WaterQualityClass_Surface_Poly. WaterQualityClass_Surface_Line.shp includes all line features from WaterQualityClass_Surface_Line except for those line features classified in AV_LEGEND as "No Show". Earlier designations of "SHARED" or of "Change of Class" are subsets of "No Show" and are eliminated also.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3020
Fax: 860-424-4067
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Process date: 2006
Data Source used
Source 23 - WaterQualityClass_Ground
Title: WaterQualityClass_Ground
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format of ground water quality classification as polygon features. It includes the 500 ft buffered areas around public water supply wells and final aquifer protection areas (as this data is adopted). It excludes ground water classifications under surface waterbodies.
Currentness reference:
publication date
Source 25 - WaterQualityClass_Surface_Poly.shp
Title: WaterQualityClass_Surface_Poly.shp
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2006
Data type: vector digital data
Data location: http://www.ct.gov/dep
Map scale denominator: 24,000
Media: disc
Source contribution:
Statewide shapefile format of surface water quality classification as polygon features.
Currentness reference:
publication date
Source 21 - WaterQualityClass_Surface_Line
Title: WaterQualityClass_Surface_Line
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody line features such as rivers and streams represented as lines at 1:24,000 scale.
Currentness reference:
publication date
Data Source produced
Source 24 - WaterQualityClass_Ground.shp
Title: WaterQualityClass_Ground.shp
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2006
Data type: vector digital data
Data location: http://www.ct.gov/dep
Map scale denominator: 24,000
Media: disc
Source contribution:
Statewide shapefile format of ground water quality classification as polygon features. It includes the 500 ft buffered areas around public water supply wells and final aquifer protection areas (as this data is adopted). It excludes ground water classifications under surface waterbodies.
Currentness reference:
publication date
Source 25 - WaterQualityClass_Surface_Poly.shp
Title: WaterQualityClass_Surface_Poly.shp
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2006
Data type: vector digital data
Data location: http://www.ct.gov/dep
Map scale denominator: 24,000
Media: disc
Source contribution:
Statewide shapefile format of surface water quality classification as polygon features.
Currentness reference:
publication date
Source 26 - WaterQualityClass_Surface_Line.shp
Title: WaterQualityClass_Surface_Line.shp
Originators: State of Connecticut, Department of Environmental Protection
Publication date: 2006
Data type: vector digital data
Data location: http://www.ct.gov/dep
Map scale denominator: 24,000
Media: disc
Source contribution:
Statewide shapefile format of surface water quality classification as line features.
Currentness reference:
publication date
Process Step 14
Process description:
Water Quality Standards revision - Edited the values of the WQCLASSP to reflect the revision to the Water Quality Standards adopted February 25, 2011.  The revisions included eliminating surface water quality classes C, D, SC, SD and all the two tiered classifications.  The two tiered classifications included a classification for the present condition and a second classification for the designated use.  All the tiered classifications were changed to the designated use classification.  The changes included B/AA to AA, B/A and C/A to A, SB/SA, SC/SA and  SD/SA to SA, C/B and D/B to B, SC/SB and SD/SB to SB. Changes were made by selecting the features based on their classification and calculating the new value to the field.  The values of the AV_LEGEND field  were edited to reflect the changes in WQCLASSP field.  Where necessary the polygons were merged to reflect the changes of the two tiered classifications.  The geographic extent of each classifications was otherwise unchanged.
Process date: 2011
Data Source used
Source 20 - WaterQualityClass_Surface_Poly
Title: WaterQualityClass_Surface_Poly
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Edition: 20061101
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Statewide geodatabase format surface water quality classifications for all waterbody area features such as lakes, ponds, bays, harbors, sounds and rivers and streams large enough to be represented as polygons at 1:24,000 scale.
Currentness reference:
publication date
Data Source produced