State rankings
Massachusetts water-system rankings
Lowest-scoring systems in Massachusetts
Ranked lowest score first. Population shown for context.
1 DUXBURY WATER DEPARTMENT DUXBURY, MA · ~16,387 served 19 2 EASTON WATER DIV SOUTH EASTON, MA · ~23,112 served 31 3 SHARON WATER DEPT SHARON, MA · ~16,846 served 31 4 HAMILTON WATER DEPT HAMILTON, MA · ~7,377 served 34 5 HOLBROOK PUBLIC WORKS DEPT HOLBROOK, MA · ~11,405 served 40 6 WOBURN WATER DEPT. WOBURN, MA · ~40,876 served 41 7 RANDOLPH WATER DEPARTMENT RANDOLPH, MA · ~34,362 served 42 8 ATTLEBORO WATER DEPT ATTLEBORO, MA · ~46,654 served 43 9 PEPPERELL DPW WATER DIVISION PEPPERELL, MA · ~9,217 served 44 10 NORWELL WATER DEPARTMENT NORWELL, MA · ~11,495 served 45 11 MILFORD WATER DEPARTMENT MILFORD, MA · ~30,379 served 48 12 MILLIS WATER DEPT MILLIS, MA · ~9,002 served 48 13 MEDFIELD WATER DEPT. MEDFIELD, MA · ~12,894 served 50 14 TOPSFIELD WATER DEPARTMENT TOPSFIELD, MA · ~5,435 served 51 15 CHELMSFORD WATER DISTRICT CHELMSFORD, MA · ~28,750 served 52 16 NORTH ATTLEBORO WATER DEPT NORTH ATTLEBOROUGH, MA · ~28,863 served 53 17 WELLESLEY WATER DIVISION WELLESLEY, MA · ~29,550 served 54 18 ACTON WATER SUPPLY DISTRICT ACTON, MA · ~20,780 served 55 19 ROWLEY WATER DEPARTMENT ROWLEY, MA · ~6,283 served 55 20 BRAINTREE WATER AND SEWER DEPT. BRAINTREE, MA · ~39,143 served 57 21 NORTON WATER DEPARTMENT NORTON, MA · ~19,161 served 57 22 NATICK WATER AND SEWER DIVISION NATICK, MA · ~37,006 served 58 23 STOUGHTON WATER DEPARTMENT STOUGHTON, MA · ~29,281 served 58 24 DARTMOUTH WATER DIVISION DARTMOUTH, MA · ~24,630 served 58 25 AQUARION WATER COMPANY, MILLBURY MILLBURY, MA · ~11,326 served 58
Highest-scoring large systems in Massachusetts
Systems serving 10,000+ people with the best scores.
1 MWRA CHELSEA, MA · ~2,660,000 served 100 2 BOSTON WATER AND SEWER COMMISSION (MWRA) BOSTON, MA · ~675,647 served 100 3 WORCESTER DPWP, WATER SUPPLY DIVISION WORCESTER, MA · ~206,518 served 100 4 SPRINGFIELD WATER AND SEWER COMMISSION SPRINGFIELD, MA · ~167,954 served 100 5 QUINCY WATER DEPT. (MWRA) QUINCY, MA · ~106,000 served 100 6 BROCKTON WATER DEPARTMENT BROCKTON, MA · ~105,643 served 100 7 INIMA USA / AQUARIA LLC NORTH DIGHTON, MA · ~105,643 served 100 8 CITY OF NEW BEDFORD DPI NEW BEDFORD, MA · ~101,079 served 100
Scores reflect EPA public records (violations, enforcement, PFAS), are system-level, and can’t account for your home’s plumbing. See the methodology.