All water systems in Massachusetts
1,613 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Norfolk Water Division Norfolk · Norfolk County |
7,602 | 1 | 0 | |
|
Halifax Water Department Halifax · Plymouth County |
7,575 | 4 | 0 | |
|
Cohasset Water Dept Cohasset · Norfolk County |
7,555 | 1 | 1 | |
|
Aquarion Water Company Oxford Oxford · Worcester County |
7,384 | 0 | 0 | |
|
Williamstown Water Dept Williamstown · Berkshire County |
7,326 | 1 | 1 | |
|
Middleton Water Dept. Middleton · Essex County |
7,291 | 2 | 1 | |
|
Lunenburg Water District Lunenburg · Worcester County |
7,219 | 0 | 0 | |
|
Spencer Water Department Spencer · Worcester County |
7,037 | 0 | 0 | |
|
Merrimac Water Department Merrimac · Essex County |
6,988 | 1 | 1 | |
|
West Boylston Water District West Boylston · Worcester County |
6,919 | 0 | 0 | |
|
Townsend Water Department Townsend · Middlesex County |
6,832 | 1 | 0 | |
|
Sterling Water Department Sterling · Worcester County |
6,814 | 2 | 0 | |
|
Orange Water Dept Orange · Franklin County |
6,526 | 0 | 0 | |
|
Groveland Water Department Groveland · Essex County |
6,508 | 0 | 0 | |
|
Devens Massdevelopment Ayer · Middlesex County |
6,500 | 0 | 0 | |
|
Dalton Fire District Dalton · Berkshire County |
6,330 | 0 | 0 | |
|
South Hadley Fire District #2 Water Dept South Hadley · Hampshire County |
6,200 | 0 | 0 | |
|
Town of Eastham Eastham · Barnstable County |
6,199 | 0 | 0 | |
|
Rowley Water Department Rowley · Essex County |
6,161 | 1 | 1 | |
|
Templeton Munic. Light and Water Plant Templeton · Worcester County |
6,159 | 0 | 0 | |
|
Marion Water Division Marion · Plymouth County |
6,119 | 0 | 0 | |
|
Tisbury Water Works Tisbury · Dukes County |
6,082 | 2 | 2 | |
|
Rutland Water Department Rutland · Worcester County |
6,025 | 0 | 0 | |
|
Hopedale Water Department Hopedale · Worcester County |
6,017 | 0 | 0 | |
|
Lancaster Water Department Lancaster · Worcester County |
6,000 | 0 | 0 | |
|
Otis Air National Guard Base Falmouth · Barnstable County |
6,000 | 2 | 2 | |
|
Winchendon Water Department Winchendon · Worcester County |
5,706 | 0 | 0 | |
|
Lee Water Dept Lee · Berkshire County |
5,686 | 1 | 1 | |
|
Lincoln Water Dept Lincoln · Middlesex County |
5,593 | 1 | 1 | |
|
Dudley Water Department Dudley · Worcester County |
5,515 | 1 | 0 | |
|
Topsfield Water Department Topsfield · Essex County |
5,435 | 2 | 2 | |
|
Barnstable Fire District Barnstable · Barnstable County |
5,400 | 0 | 0 | |
|
Onset Fire Districtwater Dept. Wareham · Plymouth County |
5,392 | 0 | 0 | |
|
Dighton Water District Dighton · Bristol County |
5,280 | 1 | 0 | |
|
Manchester by the Sea Dpw Manchester · Essex County |
5,201 | 1 | 1 | |
|
Groton Water Department Groton · Middlesex County |
5,017 | 0 | 0 | |
|
Cotuit Fire District Water Department Barnstable · Barnstable County |
4,938 | 0 | 0 | |
|
Southampton Water Dept Southampton · Hampshire County |
4,853 | 0 | 0 | |
|
Lynnfield Water Dist. (mwra) Lynnfield · Essex County |
4,820 | 0 | 0 | |
|
Hadley Dpw Water Division Hadley · Hampshire County |
4,819 | 1 | 1 | |
|
Palmer Water District No.1 Palmer · Hampden County |
4,789 | 1 | 0 | |
|
Town of Avon Avon · Norfolk County |
4,777 | 0 | 0 | |
|
Sturbridge Water Department Sturbridge · Worcester County |
4,746 | 1 | 0 | |
|
West Newbury Water Department West Newbury · Essex County |
4,704 | 2 | 1 | |
|
North Sagamore Water District Bourne · Barnstable County |
4,668 | 0 | 0 | |
|
Upton Dpw Water/wastewater Division Upton · Worcester County |
4,420 | 3 | 1 | |
|
Tyngsborough Water District Tyngsborough · Middlesex County |
4,416 | 0 | 0 | |
|
Douglas Water Department Douglas · Worcester County |
4,400 | 0 | 0 | |
|
Great Barrington Fire Dist Great Barrington · Berkshire County |
4,380 | 0 | 0 | |
|
Paxton Water Department Paxton · Worcester County |
4,300 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Massachusetts records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.