Coastal Area Land Cover Analysis Project (CALCAP)

Sponsored by the Connecticut DEP Office of Long Island Sound Programs

Basins Crossing Critical Impervious Surface Thresholds (10% and 25%)

Map Salisbury North Canaan Norfolk Colebrook Hartland Granby Suffield Enfield Somers Stafford Union Woodstock Thompson Canaan East Granby Barkhamsted Winchester Eastford Ashford Willington Ellington Windsor Locks East Windsor Putnam Tolland Windsor Sharon Canton Simsbury Cornwall Pomfret Goshen Killingly Bloomfield New Hartford Torrington Vernon South Windsor Coventry Mansfield Chaplin Hampton Brooklyn Avon Manchester Burlington Hartford Bolton West Hartford East Hartford Harwinton Litchfield Kent Warren Sterling Farmington Plainfield Andover Canterbury Windham Scotland Glastonbury Columbia Hebron Wethersfield Newington Bristol Morris New Britain Lebanon Plymouth Washington Thomaston Plainville Marlborough Rocky Hill New Milford Watertown Bethlehem Sherman Franklin Sprague Southington Berlin Lisbon Voluntown East Hampton Griswold Wolcott Portland Cromwell Colchester Waterbury Woodbury Norwich Roxbury Middletown Bozrah Meriden Preston Middlebury Bridgewater Cheshire Middlefield Salem East Haddam New Fairfield Prospect North Stonington Montville Naugatuck Haddam Brookfield Wallingford Southbury Durham Oxford Ledyard Newtown Bethany Beacon Falls Danbury Hamden East Lyme Killingworth Lyme Madison Stonington North Haven Chester Guilford Bethel Waterford North Branford Seymour Groton Deep River Woodbridge Monroe New London Essex Ridgefield Shelton East Lyme East Lyme Old Lyme Stonington East Haven Ansonia Stonington Stonington Derby Redding New Haven Stonington Westbrook Stonington Stonington Stonington Stonington Stonington Old Saybrook Stonington New London Stonington Clinton Groton New London Stonington Stonington Stonington Stonington Groton Stonington Stonington Easton Stonington Stonington Stonington Stonington Stonington Stonington Stonington Stonington Branford Groton Groton Groton Groton New London Stonington Groton Groton East Lyme Stonington Groton East Lyme Groton Groton Orange West Haven Groton East Lyme Waterford Old Lyme Old Saybrook Old Saybrook East Lyme East Lyme Waterford New London New London New London Waterford Old Saybrook East Lyme New London East Lyme East Lyme Old Lyme East Lyme East Lyme Old Lyme Old Lyme East Lyme Trumbull East Lyme Old Lyme East Lyme East Lyme Waterford East Lyme East Lyme East Lyme East Lyme East Lyme Waterford East Lyme East Lyme East Lyme East Lyme Old Lyme East Lyme East Lyme Old Lyme East Lyme Old Saybrook Old Lyme East Lyme East Lyme East Lyme East Lyme East Lyme Branford East Lyme Old Lyme Old Lyme Old Lyme Old Lyme Clinton Old Lyme Old Lyme Old Saybrook Old Lyme Old Saybrook Old Saybrook West Haven Old Saybrook Old Saybrook Milford Weston Westbrook Westbrook Branford Madison Westbrook Guilford Westbrook Madison Madison Guilford Madison Old Saybrook Clinton Westbrook Guilford Guilford Westbrook Stratford Branford Madison Westbrook Clinton Wilton East Haven Madison Madison Guilford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Westbrook Branford Clinton Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Guilford Branford Branford Branford Branford Branford Guilford Branford Branford Branford Guilford Branford Guilford Branford Branford Branford Guilford Guilford Branford Branford Branford Guilford Branford Branford Branford Branford Branford Branford Branford Guilford Branford Branford Branford Guilford Branford Branford Guilford Branford Branford Branford Branford Branford Branford Guilford Branford Branford Clinton Branford Guilford Branford Branford Branford Guilford Branford Branford Guilford Branford Branford Branford Branford Branford Branford Guilford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Guilford Branford Branford New Haven Branford New Haven Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Guilford Branford Branford Guilford Branford Branford Guilford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Branford Guilford Branford Guilford Branford East Haven East Haven East Haven Fairfield Bridgeport Milford Milford Milford Guilford New Canaan Milford Guilford Guilford Guilford Milford Milford Stratford Stratford Westport Stratford Stratford Stratford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Stamford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Milford Bridgeport Norwalk Stratford Bridgeport Bridgeport Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Stratford Bridgeport Bridgeport Fairfield Greenwich Bridgeport Bridgeport Fairfield Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Darien Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Westport Norwalk Westport Westport Westport Norwalk Norwalk Norwalk Westport Norwalk Norwalk Norwalk Westport Westport Westport Westport Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Westport Westport Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Darien Norwalk Norwalk Darien Norwalk Darien Darien Darien Darien Norwalk Darien Darien Darien Norwalk Norwalk Darien Norwalk Darien Darien Darien Stamford Darien Darien Darien Darien Darien Darien Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Greenwich Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Stamford Greenwich Stamford Stamford Stamford Greenwich Stamford Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich Greenwich

A growing body of national research indicates that water quality and overall stream health decline when the level of imperviousness in a basin exceeds 10%. At higher levels of impervious cover, often in the 25% range, water quantity and quality impacts can become severe and extremely difficult to remediate. The map shows those basins in Connecticut that have crossed one of these two critical thresholds between 1985 and 2002.


The black line separates the coastal study area* towns used for analysis by the CALCAP project from the inland towns. Basin boundaries are absent from this map due to the size of the map.

Download the pdf file for a map layout for printing that includes basin boundaries. The pdf file also allows zooming.

* The Coastal Study Area consists of the 36 Coastal Area Towns in Connecticut plus six towns bordering the Connectcut River. Visit the Study Area page for a map and the full definition of the Coastal Area and Coastal Boundary.

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