Massachusetts tap water
75 of 258 Massachusetts water systems with full PFAS testing (29%) averaged above a 2024 federal PFAS level at one or more sampling points.
- 528 active community water systems in the EPA file; 252 serve 3,300+ people and have a full PFAS set.
- 58 systems had at least one health-based violation since 2021-10-26.
- 3 systems report a lead 90th percentile above 15 ppb (some results are old; check each system page).
Largest systems
| System | People served | PFAS above a 2024 level? | Health-based violations since 2021-10-26 |
|---|---|---|---|
| Boston Water and Sewer Commission (Mwra) | 675,647 | No | 0 |
| Worcester Dpwp, Water Supply Division | 206,518 | No | 0 |
| Springfield Water and Sewer Commission | 169,170 | No | 22 |
| Lowell Regional Water Utility | 120,418 | No | 0 |
| Cambridge Water department | 118,214 | No | 0 |
| Quincy Water dept. (Mwra) | 106,000 | No | 0 |
| Brockton Water department | 105,788 | No | 0 |
| Inima USA / Aquaria LLC | 105,643 | No | 0 |
Counties
Middlesex County53 systems with full PFAS testingWorcester County42 systems with full PFAS testingEssex County31 systems with full PFAS testingNorfolk County26 systems with full PFAS testingPlymouth County23 systems with full PFAS testingBarnstable County20 systems with full PFAS testingBristol County17 systems with full PFAS testingHampden County12 systems with full PFAS testing
All 44 utilities with a page in Massachusetts
- Arlington Water dept. (Mwra) 46,308
- Attleboro Water dept 46,461
- Beverly Water dept 47,461
- Billerica Water Works 42,119
- Boston Water and Sewer Commission (Mwra) 675,647
- Brockton Water department 105,788
- Brookline Water and Sewer Division 63,191
- Cambridge Water department 118,214
- Centerville Osterville Marstons Mills Wd 50,000
- Chicopee Water dept (Mwra) 55,560
- City of New Bedford Dpi 101,079
- Dedham Westwood Water Dist. 41,630
- Dennis Water District 65,000
- Everett Water dept. (Mwra) 49,075
- Fall River Water department 94,000
- Falmouth Water dept 97,551
- Fitchburg Dpw Division of Water Supply 41,946
- Framingham Water dept. (Mwra) 72,362
- Haverhill Water dept 61,277
- Inima USA / Aquaria LLC 105,643
- Lawrence Water Works 89,143
- Leominster Water Division 41,683
- Lowell Regional Water Utility 120,418
- Lynn Water and Sewer Comm 101,253
- Malden Water Division (Mwra) 66,263
- Marlborough Dpw Water Div. (Mwra) 41,799
- Medford Water dept. (Mwra) 61,700
- Methuen Water dept 53,059
- Newton Water dept. (Mwra) 88,931
- Peabody Water dept. 54,481
- Pittsfield Dpu Water dept 43,927
- Plymouth Water department 47,100
- Quincy Water dept. (Mwra) 106,000
- Revere Water Division (Mwra) 62,186
- Salem Water department 44,480
- Somerville Water dept. (Mwra) 81,045
- Springfield Water and Sewer Commission 169,170
- Taunton Water Division 62,165
- Upper Cape Regional Water Cooperative 56,250
- Waltham Water department 65,218
- Weir River Water System 45,339
- Westfield Dpwwater Division 41,094
- Weymouth Water department 57,871
- Worcester Dpwp, Water Supply Division 206,518
Why not "the state's water quality"? You drink from one utility, not a state. Rollups count systems, not people, so one large utility counts the same as a small one. Use the system pages for your actual water.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.