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Lake Bathymetry Contours Polygon
See full Data Guide here. Lake Bathymetry describes the water depth for selected reservoirs, lakes, ponds, and coves in Connecticut. It includes depth contours, also called... -
CT DCF Town Boundaries
This file contains boundaries for each Town in the state, including the DCF Region and Area Office responsible for providing services to each Town. This data is as of 7/1/2014,... -
Annual Average Daily Traffic
A collection of layers maintained by the Traffic Monitoring Unit. -
Broadband Adoption by Tract 2025
Broadband and Internet Access Dataset — Tract-Level SummaryBroadband Subscription DataTotal broadband subscriptions across all technologiesTotal Residential broadband... -
Shellfish Area Marina
Shellfish Area Classification Set: The Connecticut Department of Environmental Protection cooperated with the Department of Agriculture, Bureau of Aquaculture to publish the... -
Connecticut Senate Districts (2011 - 2020)
Connecticut Senate Districts is not intended for maps printed at map scales greater or more detailed than 1:100,000 scale (1 inch = 1.578 mile). -
Wildlife Action Plan Manage Conservation Opportunity 2025
The 2025 Connecticut State Wildlife Action Plan conservation opportunity areas (COAs) represent locations partners can conduct actions to benefit wildlife populations and... -
MetroCOG
Contours are lines of equal elevation. This is a contour feature layer for the state of Connecticut derived from the index contour in the 1' contour data set. All closed... -
Subregional Basin Line
A standardized mapping of natural drainage basins in Connecticut was completed in 1981 by the Connecticut Department of Environmental Protection (DEP). This drainage basin... -
EPCRA Tier 2 Facilities
Submission of Tier II form is required under Section 312 of the Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA). The purpose of this form is to provide state,... -
DEEP Fisheries Stream Survey Points
Fisheries Stream Survey Site includes points along streams which have been surveyed for a variety of characteristics relative to fish habitat. This datalayer includes stream... -
Cold Water Supporting Drainage Basin
Cold water habitat was determined using available fish and water temperature data collected by the Connecticut Department of Energy and Environmental Protection (CT DEEP)... -
WestCOG
Contours are lines of equal elevation. This is a contour feature layer for the state of Connecticut derived from the index contour in the 1' contour data set. All closed... -
CT DCF Area Boundaries
This is a boundary file showing the catchment area for which each of the 14 DCF Area Offices is responsible. Catchment areas are comprised of complete Towns, but not necessarily... -
Impaired River 2024
Connecticut 303(d) Impaired Waters 2024 is a subset of Connecticut 305(b) Assessed Waters 2024. If any one of the assigned designated uses is categorized as NOT Supporting, the... -
Northeast Town Lines
Northeastern United States Town Boundary data are intended for geographic display of state, county and town (municipal) boundaries at statewide and regional levels. Use it to... -
Water Pollution Control Facilities
Water Pollution Control Facilities represents data extracted from permit applications submitted to DEEP. Alias is the facility name utilized in DEEPs internal system whereas the... -
Connecticut House Districts (2011- 2020)
Connecticut House Districts is not intended for maps printed at map scales greater or more detailed than 1:100,000 scale (1 inch = 1.578 mile). -
Impaired Estuary 2024
Connecticut 303(d) Impaired Waters 2024 is a subset of Connecticut 305(b) Assessed Waters 2024. If any one of the assigned designated uses is categorized as NOT Supporting, the... -
Regional Drainage Basin Lines
See full Data Guide here. Regional Drainage Basin Set: Connecticut Regional Drainage Basins is 1:24,000-scale, polygon and line feature data that define Regional drainage basin...
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