County · Massachusetts
Suffolk County, Massachusetts: drinking water records
This overview covers 35 ZIP codes and 5 community water systems in Suffolk County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Boston Water and Sewer Commission (MWRA) MA3035000 | 675,647 | 120 | 0 | 1 | 5.8 ppb |
| Revere Water Division (MWRA) MA3248000 | 62,186 | 120 | 1 | 0 | 8.1 ppb |
| Chelsea Water Dept. (MWRA) MA3057000 | 40,787 | 120 | 0 | 0 | 2.4 ppb |
| Winthrop Water Division, (MWRA) MA3346000 | 19,316 | 120 | 0 | 0 | 8.3 ppb |
| MWRA MA6000000 | 2,580,000 | 0 | 0 | 0 | 5.9 ppb |
ZIP reports in Suffolk County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.