All water systems in Massachusetts
1,613 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mwra Boston · Suffolk County |
2,580,000 | 0 | 0 | |
|
Tri Town Water Board Braintree · Norfolk County |
856,000 | 0 | 0 | |
|
Boston Water and Sewer Commission (mwra) Boston · Suffolk County |
675,647 | 1 | 1 | |
|
Worcester Dpwp, Water Supply Division Worcester · Worcester County |
206,518 | 0 | 0 | |
|
Springfield Water and Sewer Commission Springfield · Hampden County |
169,170 | 1 | 0 | |
|
Lowell Regional Water Utility Lowell · Middlesex County |
120,418 | 1 | 1 | |
|
Cambridge Water Department Cambridge · Middlesex County |
118,214 | 0 | 0 | |
|
Quincy Water Dept. (mwra) Quincy · Norfolk County |
106,000 | 0 | 0 | |
|
Brockton Water Department Brockton · Plymouth County |
105,788 | 1 | 0 | |
|
Inima USA / Aquaria LLC Dighton · Bristol County |
105,643 | 1 | 0 | |
|
Lynn Water and Sewer Comm Lynn · Essex County |
101,253 | 0 | 0 | |
|
City of New Bedford Dpi New Bedford · Bristol County |
101,079 | 0 | 0 | |
|
Falmouth Water Dept Falmouth · Barnstable County |
97,551 | 0 | 0 | |
|
Fall River Water Department Fall River · Bristol County |
94,000 | 2 | 1 | |
|
Salem and Beverly Water Supply Board Beverly · Essex County |
90,330 | 1 | 0 | |
|
Lawrence Water Works Lawrence · Essex County |
89,143 | 1 | 1 | |
|
Newton Water Dept. (mwra) Newton · Middlesex County |
88,931 | 1 | 1 | |
|
Somerville Water Dept. (mwra) Somerville · Middlesex County |
81,045 | 1 | 1 | |
|
Framingham Water Dept. (mwra) Framingham · Middlesex County |
72,362 | 0 | 0 | |
|
Malden Water Division (mwra) Malden · Middlesex County |
66,263 | 2 | 2 | |
|
Waltham Water Department Waltham · Middlesex County |
65,218 | 1 | 1 | |
|
Dennis Water District Dennis · Barnstable County |
65,000 | 0 | 0 | |
|
Brookline Water and Sewer Division Brookline · Norfolk County |
63,191 | 0 | 0 | |
|
Revere Water Division (mwra) Revere · Suffolk County |
62,186 | 1 | 1 | |
|
Taunton Water Division Taunton · Bristol County |
62,165 | 0 | 0 | |
|
Medford Water Dept. (mwra) Medford · Middlesex County |
61,700 | 1 | 1 | |
|
Haverhill Water Dept Haverhill · Essex County |
61,277 | 1 | 1 | |
|
Weymouth Water Department Weymouth · Norfolk County |
57,871 | 1 | 0 | |
|
Upper Cape Regional Water Cooperative Sandwich · Barnstable County |
56,250 | 0 | 0 | |
|
Chicopee Water Dept (mwra) Chicopee · Hampden County |
55,560 | 2 | 1 | |
|
Peabody Water Dept. Peabody · Essex County |
54,481 | 0 | 0 | |
|
Methuen Water Dept Methuen · Essex County |
53,059 | 1 | 1 | |
|
Centerville Osterville Marstons Mills WD Barnstable · Barnstable County |
50,000 | 2 | 0 | |
|
Everett Water Dept. (mwra) Everett · Middlesex County |
49,075 | 1 | 1 | |
|
Beverly Water Dept Beverly · Essex County |
47,461 | 0 | 0 | |
|
Plymouth Water Department Plymouth · Plymouth County |
47,100 | 0 | 0 | |
|
Randolph/holbrook Joint Water Board Randolph · Norfolk County |
46,519 | 0 | 0 | |
|
Attleboro Water Dept Attleboro · Bristol County |
46,461 | 0 | 0 | |
|
Arlington Water Dept. (mwra) Arlington · Middlesex County |
46,308 | 0 | 0 | |
|
Weir River Water System Hingham · Plymouth County |
45,339 | 0 | 0 | |
|
Salem Water Department Salem · Essex County |
44,480 | 0 | 0 | |
|
Pittsfield Dpu Water Dept Pittsfield · Berkshire County |
43,927 | 1 | 1 | |
|
Billerica Water Works Billerica · Middlesex County |
42,119 | 0 | 0 | |
|
Fitchburg Dpw Division of Water Supply Fitchburg · Worcester County |
41,946 | 0 | 0 | |
|
Marlborough Dpw Water Div. (mwra) Marlborough · Middlesex County |
41,799 | 0 | 0 | |
|
Leominster Water Division Leominster · Worcester County |
41,683 | 0 | 0 | |
|
Dedham Westwood Water Dist. Dedham · Norfolk County |
41,630 | 0 | 0 | |
|
Westfield Dpwwater Division Westfield · Hampden County |
41,094 | 1 | 0 | |
|
Woburn Water Dept. Woburn · Middlesex County |
40,876 | 0 | 0 | |
|
Chelsea Water Dept. (mwra) Chelsea · Suffolk County |
40,787 | 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.