Aquifer Protection Area Maps
Connecticut has approximately 123 existing aquifer protection areas located in 80 towns. The Aquifer Protection Area Interactive Map displays Connecticut's Aquifer Protection Areas (APAs) using 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.
To view the Aquifer Protection Areas in a specific town, select the town from the map or choose from the drop-down list. You can also view a letter-sized state-wide map of the Aquifer Protection Areas (11 x 8.5 inch) or 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 ground water supply based upon the texture and thickness of surficial aquifer deposits. (See Surficial Aquifer Potential Map.)
The Aquifer Protection Areas GIS Set can be downloaded from CT DEEP GIS Open Data for use in mapping software.
Content last updated on September 10, 2025