Connecticut Department of Energy & Environmental Protection

DEEP headquarters at 79 Elm Street in Hartford has partially re-opened to staff and members of the public as of Tuesday, February 3. The DEEP records room has re-opened. The DEEP Central Permit Processing Unit (CPPU) will be open to the public starting on Wednesday, Feb. 4. For updates, please click here

Aquifer Protection Area Maps

Connecticut has approximately 123 existing aquifer protection areas located in 80 towns. Click here to access the Click here to access the Aquifer Protection Area Interactive Map which is an interactive GIS mapping tool. The map shows the towns in the program and the Aquifer Protection Areas for which they are responsible. The map contains layers that allow the user to zoom to view the APA mapped boundary and the parcels within that boundary. The map may be viewed using the base map, the imagery map with labels, the streets map, and the topographic map. 

There are two static state-wide maps available for viewing. Click here to view a letter-sized state-wide map of the Aquifer Protection Areas (11 x 8.5 inch) or click here to view a large state-wide map of the Aquifer Protection Areas (36 x 24 inch).

Municipalities may be interested in protecting groundwater for future source use. The Surficial Aquifer Potential Map of Connecticut has been prepared by the Connecticut Geological Survey for statewide resource protection, water management, non-point source pollution prevention, and land use planning. The map identifies areas with greater potential for groundwater supply based upon the texture and thickness of surficial aquifer deposits. Click here to view the Surficial Aquifer Potential Map to learn which areas may have potential for groundwater supply.

The Aquifer Protection Areas GIS Set can be downloaded from CT DEEP GIS Open Data for use in mapping software. 

Return to the Aquifer Protection Area Program home page to access more information. 

Content last updated on January 29, 2026.