Plymouth County tap water
12 of 23 water systems serving Plymouth County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 45 community water systems list this county as served; 23 serve 3,300+ people with full PFAS testing.
- 11 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Brockton Water department | Surface water | 105,788 | No | 0 |
| Plymouth Water department | Groundwater | 47,100 | No | 0 |
| Weir River Water System | Surface water | 45,339 | No | 0 |
| Marshfield Water department | Groundwater | 34,000 | Yes | 0 |
| Abington/Rockland Joint Wtr. Works | Surface water | 33,387 | Yes | 1 |
| Mattapoisett River Valley W.d. | Purchased groundwater | 29,600 | No | 0 |
| Bridgewater Water department | Groundwater | 28,633 | Yes | 0 |
| Wareham Fire District | Groundwater | 20,102 | No | 0 |
| Scituate Water Division | Surface water | 19,297 | Yes | 5 |
| Pembroke Water Division Dpw | Groundwater | 18,175 | No | 0 |
| Duxbury Water department | Groundwater | 16,387 | Yes | 0 |
| Middleborough Water Supply | Groundwater | 15,350 | Yes | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
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.