Water Quality Report

Our number one goal is to provide customers with safe, reliable drinking water.

More than 170,000 water quality tests are conducted each year on the water delivered to our customers. That’s an average of 400 tests each day.

We test routinely for over 120 potential contaminants and parameters that could affect the quality of your tap water. The test results are summarized in an Annual Water Quality Report which is available posted on our website. (Below.)

The Annual Water Quality Report also includes information about a Source Water Assessment done by the Connecticut Department of Public Health (DPH), which is used to assess the susceptibility of water sources to potential contamination.

We operate 70 different water systems across the state. Find your system’s water report below. Some towns are served by more than one water system. If you are not sure which system serves your home or location, please call our customer service team at 1-800-286-5700 or email your address to us via this form.

For general information on water quality, please visit our Common Questions About Water Quality page.

Town	Water System(s)
Ashford	Ashford Elderly/Pompey Hollow, Ashford Park
Avon	Collinsville, Unionville
Beacon Falls	Central
Bethany	Central
Bolton	Llynwood
Brooklyn	Crystal
Burlington	Collinsville
Canton	Collinsville
Chester	Chester, Chester Village West
Clinton	Guilford
Colchester	Amston Lake, Ponemah Village, Westchester Village
Columbia	Columbia Heights
Coventry	Coventry Hills, General Water, Lakeview, Lakewood, Nathan Hale, Pilgrim Hills, South Coventry
Deep River	Chester
East Granby	Northern-Western
East Haddam	Banner Village, Lake Hayward
East Hampton	Baker Hill, Spice Hill, Westchester East
East Windsor	Northern-Western
Ellington	Northern-Western
Enfield	Northern-Western
Essex	Chester
Farmington	Chimney Hill, Unionville
Griswold	Bay Mountain, Country Mobile Estates
Guilford	Guilford
Hebron	Amston Lake, Country Manor, Hebron Center, London Park, Mill at Stonecroft, Wellswood Village
Killingly	Crystal
Killingworth	Beechwood
Lebanon	Amston Lake, Lebanon Elderly
Madison	Green Springs, Guilford, Legend Hill
Manchester	Redwood Farms
Mansfield	Birchwood Heights, Crystal Springs, Pinewoods Lane, Rolling Hills*, Storrs Mansfield
Marlborough	Florence Lord Elderly-MASH, Forest Homes, Marlborough Gardens, Sachem Village
Middlebury	Central , Hill Crest Fire District
Naugatuck	Central
Old Lyme	Point O’Woods, Soundview
Old Saybrook	Guilford
Plainfield	Gallup, Plainfield
Plymouth	Terryville
Portland	Rivercrest
Prospect	Central
Somers	Northern-Western
South Windsor	Northern-Western
Stafford	Stafford Springs
Stonington	Masons Island
Storrs Mansfield	Storrs Mansfield
Suffield	Northern-Western
Thomaston	Thomaston
Thompson	Thompson
Tolland	Northern-Western
Vernon	Llynwood, Reservoir Heights, Northern-Western
Voluntown	SDC
Waterbury	Central
Westbrook	Guilford
Willington	Riversedge
Windsor Locks	Northern-Western
Woodstock	Cornfield Point

*Rolling Hills is now served by the Western Water System.