Water Quality Classification Maps

Water Quality Classifications Resource Guide The Water Quality Classification Maps are an element of the Connecticut Water Quality Standards and show the class assigned to each surface water and ground water resource throughout the state. The Water Quality Classification Maps have been adopted and are amended from time to time pursuant to the statutory process described in section 22a-426 of the Connecticut General Statutes. The maps are used to relate designated uses and the applicable Standards and Criteria for each class of surface and ground water resource to a specific location. GIS Shapefiles of the Water Quality Classifications (Ground Water Quality Classifications Polygon, Surface Water Quality Classification Line or Surface Water Quality Classification Polygon) are available for download on the GIS Data web page. Or, view in the online Connecticut Water Quality Classification Interactive Web Map.
Current Water Quality Classification by Municipality
Andover East Granby Manchester Prospect Watertown
Ansonia East Haddam Mansfield Putnam West Hartford
Ashford East Hampton Marlborough Redding West Haven
Avon East Hartford Meriden Ridgefield Westbrook
Barkhamsted East Haven Middlebury Rocky Hill Weston
Beacon Falls East Lyme Middlefield Roxbury Westport
Berlin East Windsor Middletown Salem Wethersfield
Bethany Eastford Milford Salisbury Willington
Bethel Easton Monroe Scotland Wilton
Bethlehem Ellington Montville Seymour Winchester
Bloomfield Enfield Morris Sharon Windham
Bolton Essex Naugatuck Shelton Windsor
Bozrah Fairfield New Britain Sherman Windsor Locks
Branford Farmington New Canaan Simsbury Wolcott
Bridgeport Franklin New Fairfield Somers Woodbridge
Bridgewater Glastonbury New Hartford South Windsor Woodbury
Bristol Goshen New Haven Southbury Woodstock
Brookfield Granby New London Southington
Brooklyn Greenwich New Milford Sprague
Burlington Griswold Newington Stafford
Canaan Groton Newtown Stamford
Canterbury Guilford Norfolk Sterling
Canton Haddam North Branford Stonington
Chaplin Hamden North Canaan Stratford
Cheshire Hampton North Haven Suffield
Chester Hartford North Stonington Thomaston
Clinton Hartland Norwalk Thompson
Colchester Harwinton Norwich Tolland
Colebrook Hebron Old Lyme Torrington
Columbia Kent Old Saybrook Trumbull
Cornwall Killingly Orange Union
Coventry Killingworth Oxford Vernon
Cromwell Lebanon Plainfield Voluntown
Danbury Ledyard Plainville Wallingford
Darien Lisbon Plymouth Warren
Deep River Litchfield Pomfret Washington
Derby Lyme Portland Waterbury
Durham Madison Preston Waterford

Content last updated on January 3, 2024