Massachusetts tap water, by utility.

265 utilities with a full report, serving 9.8 million people as they report it. Regulated PFAS turned up at 116 of them.

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The 100 largest, by people served

Massachusetts utilities, The 100 largest, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
MWRA	Boston	2,580,000	Not sampled	0
Boston Water and Sewer Commission (MWRA)	Boston	675,647	None found	1
Worcester Dpwp, Water Supply Division	Worcester	206,518	None found	0
Springfield Water and Sewer Commission	Springfield	169,170	None found	9
Lowell Regional Water Utility	Lowell	120,418	PFOA	1
Cambridge Water Department	Cambridge	118,214	PFOA	0
Quincy Water Dept. (MWRA)	Quincy	106,000	None found	0
Brockton Water Department	Brockton	105,788	None found	1
Inima USA / Aquaria LLC	Dighton	105,643	None found	0
Lynn Water and Sewer Comm	Lynn	101,253	PFOA, PFBS	0
City of New Bedford Dpi	New Bedford	101,079	None found	0
Falmouth Water Dept	Falmouth	97,551	None found	4
Fall River Water Department	Fall River	94,000	None found	0
Salem and Beverly Water Supply Board	Beverly	90,330	Not sampled	0
Lawrence Water Works	Lawrence	89,143	None found	1
Newton Water Dept. (MWRA)	Newton	88,931	None found	0
Somerville Water Dept. (MWRA)	Somerville	81,045	None found	1
Framingham Water Dept. (MWRA)	Framingham	72,362	None found	0
Malden Water Division (MWRA)	Malden	66,263	None found	1
Waltham Water Department	Waltham	65,218	None found	0
Dennis Water District	Dennis	65,000	None found	0
Brookline Water and Sewer Division	Brookline	63,191	None found	0
Revere Water Division (MWRA)	Revere	62,186	None found	0
Taunton Water Division	Taunton	62,165	None found	0
Medford Water Dept. (MWRA)	Medford	61,700	None found	2
Haverhill Water Dept	Haverhill	61,277	None found	0
Weymouth Water Department	Weymouth	57,871	None found	0
Upper Cape Regional Water Cooperative	Sandwich	56,250	None found	0
Chicopee Water Dept (MWRA)	Chicopee	55,560	None found	0
Peabody Water Dept.	Peabody	54,481	PFOA, PFBS	0
Methuen Water Dept	Methuen	53,059	PFOA	0
Centerville Osterville Marstons Mills WD	Barnstable	50,000	PFOA, PFHxS, PFBS	0
Everett Water Dept. (MWRA)	Everett	49,075	None found	0
Beverly Water Dept	Beverly	47,461	None found	0
Plymouth Water Department	Plymouth	47,100	PFBS	0
Randolph/Holbrook Joint Water Board	Randolph	46,519	Not sampled	0
Attleboro Water Dept	Attleboro	46,461	PFOA, PFOS, PFHxS	1
Arlington Water Dept. (MWRA)	Arlington	46,308	None found	0
Weir River Water System	Hingham	45,339	PFOA, PFBS	0
Salem Water Department	Salem	44,480	None found	0
Pittsfield Dpu Water Dept	Pittsfield	43,927	None found	1
Billerica Water Works	Billerica	42,119	PFOA, PFBS	3
Fitchburg DPW Division of Water Supply	Fitchburg	41,946	PFOA	0
Marlborough DPW Water Div. (MWRA)	Marlborough	41,799	None found	0
Leominster Water Division	Leominster	41,683	PFOA	2
Dedham Westwood Water Dist.	Dedham	41,630	PFOA, PFOS	1
Westfield Dpwwater Division	Westfield	41,094	None found	0
Woburn Water Dept.	Woburn	40,876	PFOA, PFOS, PFBS	0
Chelsea Water Dept. (MWRA)	Chelsea	40,787	None found	0
Amherst DPW Water Division	Amherst	39,263	None found	1
Harwich Water Department	Harwich	39,144	None found	0
Braintree Water and Sewer Dept.	Braintree	39,143	PFOA, PFOS, PFBS	0
Yarmouth Water Department	Yarmouth	38,900	PFHxS	1
Shrewsbury Water Department	Shrewsbury	38,325	PFOA, PFOS, PFBS	0
Holyoke Water Works	Holyoke	37,838	None found	0
Gloucester Public Utility Division	Gloucester	37,440	None found	0
Natick Water and Sewer Division	Natick	37,006	PFOA, PFOS, PFHxS, PFBS	0
Mashpee Water District	Mashpee	36,922	None found	0
Andover Water Dept	Andover	36,569	None found	2
Watertown Department of Public Works	Watertown	35,985	None found	0
Randolph Water Department	Randolph	35,114	PFOA, PFOS, PFHxS	0
Brewster Water Department	Brewster	35,000	None found	0
Hyannis Water System, Town of Barnstable	Barnstable	35,000	None found	0
Lexington Water Dept. (MWRA)	Lexington	34,074	None found	0
Marshfield Water Department	Marshfield	34,000	PFOA, PFOS, PFBS	1
Franklin Water Department	Franklin	33,706	PFOA, PFOS, PFHxS, PFBS	0
Abington/Rockland Joint WTR. Works	Abington	33,387	PFOA, PFOS, PFHxS, PFBS	2
Needham Water Dept	Needham	31,664	PFOA, PFOS	0
North Attleboro Water Dept	North Attleborough	31,410	PFOA, PFOS, PFHxS, PFBS	0
Tewksbury Water Department	Tewksbury	31,342	PFOA	2
North Andover Water Dept	North Andover	30,915	None found	0
Milford Water Department	Milford	30,379	PFOA, PFOS, PFBS	0
Chatham Water Department	Chatham	30,000	None found	0
Melrose Water Division (MWRA)	Melrose	29,938	None found	1
Norwood Water Dept. (MWRA)	Norwood	29,909	None found	0
Mattapoisett River Valley W.D.	Mattapoisett	29,600	None found	0
Northampton Water Division	Northampton	29,571	None found	0
Wellesley Water Division	Wellesley	29,550	PFOA, PFOS, PFBS	0
Stoughton Water Department	Stoughton	29,281	PFOA, PFOS, PFBS	0
West Springfield DPW Water Division	West Springfield	28,835	None found	0
Chelmsford Water District	Chelmsford	28,750	PFOA, PFOS, PFBS	0
Agawam Water Department	Agawam	28,692	None found	6
Bridgewater Water Department	Bridgewater	28,633	PFOA, PFOS, PFHxS, PFBS	0
Milton Water Dept. (MWRA)	Milton	28,630	None found	0
Danvers Water Dept.	Danvers	28,087	PFOS	1
Saugus Water Dept. (MWRA)	Saugus	27,844	None found	0
Wannacomet Water Company	Nantucket	27,703	None found	0
Belmont Water Dept. (MWRA)	Belmont	27,442	None found	0
Wakefield Water Dept	Wakefield	27,090	PFOA	0
Reading Water Department (MWRA)	Reading	26,262	None found	1
Burlington Water Dept	Burlington	25,864	None found	0
Dracut Water Supply District	Dracut	25,808	PFOA, PFBS	0
Easton Water Div	Easton	25,058	PFOA, PFOS, PFHxS, PFBS	0
Dartmouth Water Division	Dartmouth	24,696	PFOA, PFOS, PFBS	10
Walpole Water Dept	Walpole	24,070	PFOA, PFOS	0
Oak Bluffs Water District	Oak Bluffs	24,000	None found	0
Stoneham Water Dept (MWRA Supply)	Stoneham	23,244	None found	1
Sandwich Water District	Sandwich	23,000	None found	0
Winchester Water Dept	Winchester	22,970	None found	0
Canton Water Dept	Canton	22,766	PFOA	0

Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q2 and UCMR 5.