Massachusetts Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), Massachusetts has 564 active community water systems in this extract. PlainEnviro's health-based slice lists 1,140 violation records across 50 systems with at least one such row. These are historical EPA registry counts, not a statewide drinkability score.
Health-based violation records for 564 community water systems in Massachusetts. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | TWIN OAKS MHP MIDLAND Savoy | 68 | Yes |
| 2 | CHERRY VALLEY/ ROCHDALE WATER DISTRICT Rochdale | 48 | Yes |
| 3 | LONGMEADOW WATER DEPT Longmeadow | 36 | Yes |
| 4 | BOUMIL GROVE CONDOS Andover | 35 | Yes |
| 5 | RAYMOND WOODS TOWNHOUSES Scituate | 32 | Yes |
| 6 | SPRINGFIELD WATER AND SEWER COMMISSION Springfield | 27 | Yes |
| 7 | MOUNT ST MARYS ABBEY Wrentham | 26 | Yes |
| 8 | COUNTRY MANOR Norton | 25 | Yes |
| 9 | MONROE WATER DISTRICT Monroe | 23 | Yes |
| 10 | BELLINGHAM DPW WATER SEWER DIVISION Bellingham | 23 | Yes |
| 11 | DARTMOUTH WATER DIVISION Dartmouth | 22 | Yes |
| 12 | MONTROSE CONDOS Amesbury | 22 | Yes |
| 13 | HANOVER WATER DEPT Hanover | 21 | Yes |
| 14 | MADDEN ESTATES West Brookfield | 20 | Yes |
| 15 | PLAINVILLE WATER DEPARTMENT Plainville | 20 | Yes |
| 16 | SWANSEA WATER DISTRICT Swansea | 20 | Yes |
| 17 | SOMERSET WATER DEPARTMENT Somerset | 18 | Yes |
| 18 | EAST LONGMEADOW DPW WATER DEPT East Longmeadow | 16 | Yes |
| 19 | THREE RIVERS M H COMMUNITY Sudbury | 16 | Yes |
| 20 | RUTLAND WATER DEPARTMENT Rutland | 14 | Yes |
| 21 | NORTH READING WATER DEPT. North Reading | 13 | Yes |
| 22 | CHESTER WATER DEPT Chester | 12 | Yes |
| 23 | HOLLISTON WATER DEPARTMENT Holliston | 12 | Yes |
| 24 | MAYNARD DPW, WATER DIVISION Maynard | 12 | Yes |
| 25 | AGAWAM WATER DEPARTMENT Agawam | 10 | Yes |
| 26 | REVEL PELHAM Westborough | 10 | Yes |
| 27 | MELROSE WATER DIVISION (MWRA) Melrose | 9 | Yes |
| 28 | NORTON WATER DEPARTMENT Norton | 9 | Yes |
| 29 | SCITUATE WATER DIVISION Scituate | 9 | Yes |
| 30 | MILL RIVER WATER TAKERS ASSOCIATION Mill River | 8 | Yes |
| 31 | MEDFORD WATER DEPT. (MWRA) Medford | 8 | Yes |
| 32 | BROOKWOOD APARTMENTS Marblehead | 7 | Yes |
| 33 | HOUSATONIC WATER WORKS Great Barrington | 7 | Yes |
| 34 | WESTMINSTER DEPARTMENT OF PUBLIC WORKS Westminster | 7 | Yes |
| 35 | BILLERICA WATER WORKS Billerica | 7 | Yes |
| 36 | CHELSEA WATER DEPT. (MWRA) Chelsea | 7 | Yes |
| 37 | LOWELL REGIONAL WATER UTILITY Lowell | 7 | Yes |
| 38 | MALDEN WATER DIVISION (MWRA) Malden | 7 | Yes |
| 39 | SOMERVILLE WATER DEPT. (MWRA) Somerville | 7 | Yes |
| 40 | STONEHAM WATER DEPT (MWRA SUPPLY) Stoneham | 7 | Yes |
| 41 | GREAT BARRINGTON FIRE DIST Great Barrington | 6 | Yes |
| 42 | EVERETT WATER DEPT. (MWRA) Everett | 6 | Yes |
| 43 | WESTON WATER DEPT. Weston | 6 | Yes |
| 44 | FALMOUTH WATER DEPT Falmouth | 6 | Yes |
| 45 | SOUTH DEERFIELD WATER SUPPLY DISTRICT South Deerfield | 5 | Yes |
| 46 | LEOMINSTER WATER DIVISION Leominster | 5 | Yes |
| 47 | CONCORD WATER DEPT Concord | 5 | Yes |
| 48 | MILTON WATER DEPT. (MWRA) Milton | 5 | Yes |
| 49 | REVERE WATER DIVISION (MWRA) Revere | 5 | Yes |
| 50 | ROWLEY WATER DEPARTMENT Rowley | 5 | Yes |
Most Common Contaminants in Massachusetts
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Lead and Copper Rule | 289 | 121 |
| TTHM | 272 | 30 |
| Total Haloacetic Acids (HAA5) | 115 | 11 |
| Revised Total Coliform Rule | 103 | 49 |
| Nitrate | 57 | 2 |
| Combined Radium (-226 and -228) | 55 | 5 |
| Arsenic | 54 | 5 |
| Gross Alpha, Excl. Radon and U | 38 | 2 |
| Groundwater Rule | 27 | 15 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 27 | 14 |
| Surface Water Treatment Rule | 27 | 14 |
| Coliform (TCR) | 21 | 14 |
| Tetrachloroethylene | 14 | 1 |
| Bromate | 12 | 2 |
| Interim Enhanced Surface Water Treatment Rule | 9 | 4 |
Cities with Water Quality Issues
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Massachusetts are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.