All water systems in Massachusetts
1,613 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Amherst Dpw Water Division Amherst · Hampshire County |
39,263 | 1 | 0 | |
|
Harwich Water Department Harwich · Barnstable County |
39,144 | 0 | 0 | |
|
Braintree Water and Sewer Dept. Braintree · Norfolk County |
39,143 | 1 | 1 | |
|
Yarmouth Water Department Yarmouth · Barnstable County |
38,900 | 1 | 1 | |
|
Shrewsbury Water Department Shrewsbury · Worcester County |
38,325 | 1 | 0 | |
|
Holyoke Water Works Holyoke · Hampden County |
37,838 | 0 | 0 | |
|
Gloucester Public Utility Division Gloucester · Essex County |
37,440 | 0 | 0 | |
|
Natick Water and Sewer Division Natick · Middlesex County |
37,006 | 1 | 1 | |
|
Mashpee Water District Mashpee · Barnstable County |
36,922 | 0 | 0 | |
|
Andover Water Dept Andover · Essex County |
36,569 | 1 | 1 | |
|
Watertown Department of Public Works Watertown · Middlesex County |
35,985 | 0 | 0 | |
|
Bluedrop Water @ Randolph Dpw Randolph · Norfolk County |
35,114 | 1 | 0 | |
|
Bluedrop Water @ ST Bernadette Church Randolph · Norfolk County |
35,114 | 0 | 0 | |
|
Randolph Water Department Randolph · Norfolk County |
35,114 | 0 | 0 | |
|
Brewster Water Department Brewster · Barnstable County |
35,000 | 2 | 0 | |
|
Hyannis Water System, Town of Barnstable Barnstable · Barnstable County |
35,000 | 1 | 0 | |
|
Lexington Water Dept. (mwra) Lexington · Middlesex County |
34,074 | 1 | 1 | |
|
Marshfield Water Department Marshfield · Plymouth County |
34,000 | 2 | 1 | |
|
Franklin Water Department Franklin · Norfolk County |
33,706 | 1 | 1 | |
|
Abington/rockland Joint Wtr. Works Abington · Plymouth County |
33,387 | 2 | 1 | |
|
Needham Water Dept Needham · Norfolk County |
31,664 | 0 | 0 | |
|
North Attleboro Water Dept North Attleborough · Bristol County |
31,410 | 1 | 1 | |
|
Tewksbury Water Department Tewksbury · Middlesex County |
31,342 | 1 | 1 | |
|
North Andover Water Dept North Andover · Essex County |
30,915 | 0 | 0 | |
|
Milford Water Department Milford · Worcester County |
30,379 | 0 | 0 | |
|
Chatham Water Department Chatham · Barnstable County |
30,000 | 0 | 0 | |
|
Melrose Water Division (mwra) Melrose · Middlesex County |
29,938 | 1 | 1 | |
|
Norwood Water Dept. (mwra) Norwood · Norfolk County |
29,909 | 0 | 0 | |
|
Mattapoisett River Valley W.d. Mattapoisett · Plymouth County |
29,600 | 0 | 0 | |
|
Northampton Water Division Northampton · Hampshire County |
29,571 | 0 | 0 | |
|
Wellesley Water Division Wellesley · Norfolk County |
29,550 | 1 | 1 | |
|
Stoughton Water Department Stoughton · Norfolk County |
29,281 | 2 | 0 | |
|
West Springfield Dpw Water Division West Springfield · Hampden County |
28,835 | 0 | 0 | |
|
Chelmsford Water District Chelmsford · Middlesex County |
28,750 | 1 | 0 | |
|
Bluedrop Water Vending N Att Dpw North Attleborough · Bristol County |
28,712 | 0 | 0 | |
|
Agawam Water Department Agawam · Hampden County |
28,692 | 1 | 0 | |
|
Bridgewater Water Department Bridgewater · Plymouth County |
28,633 | 1 | 1 | |
|
Milton Water Dept. (mwra) Milton · Norfolk County |
28,630 | 1 | 1 | |
|
Danvers Water Dept. Danvers · Essex County |
28,087 | 1 | 0 | |
|
Saugus Water Dept. (mwra) Saugus · Essex County |
27,844 | 0 | 0 | |
|
Wannacomet Water Company Nantucket · Nantucket County |
27,703 | 7 | 2 | |
|
Belmont Water Dept. (mwra) Belmont · Middlesex County |
27,442 | 1 | 1 | |
|
Wakefield Water Dept Wakefield · Middlesex County |
27,090 | 2 | 1 | |
|
Reading Water Department (mwra) Reading · Middlesex County |
26,262 | 1 | 0 | |
|
Burlington Water Dept Burlington · Middlesex County |
25,864 | 1 | 0 | |
|
Dracut Water Supply District Dracut · Middlesex County |
25,808 | 0 | 0 | |
|
Easton Water Div Easton · Bristol County |
25,058 | 0 | 0 | |
|
Dartmouth Water Division Dartmouth · Bristol County |
24,696 | 2 | 0 | |
|
Walpole Water Dept Walpole · Norfolk County |
24,070 | 1 | 0 | |
|
Oak Bluffs Water District Oak Bluffs · Dukes County |
24,000 | 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.