Massachusetts Drinking Water Compliance Records
527 water systems serving 9,973,797 people. 2,069 historical EPA violation records in the Q2 2026 snapshot.
TapScore Compliance-History Grades
A
527
100%
B
0
0%
C
0
0%
D
0
0%
F
0
0%
527
Water Systems
9,973,797
Population Served
2,069
Historical Records
49
Health-Based (All Years)
Systems With the Most Recent EPA Records
SHARON WATER DEPT
16,846 served1 historical record
A
ANDREWS FARM WATER CO.,INC.
150 served10 historical records
A
BLACKSTONE WATER DEPARTMENT
9,463 served2 historical records
A
MAPLEBROOK APARTMENTS
33 served1 historical record
A
WOODLAND RIDGE
125 served33 historical records
A
REGENCY AT BOLTON CONDOMINIUMS
148 served1 historical record
A
PEMBROKE WATER DIVISION DPW
18,175 served1 historical record
A
STURBRIDGE RETIREMENT COOP. CORP.
350 served3 historical records
A
WILLIAMSTOWN WATER DEPT
7,326 served4 historical records
A
WEST NEWBURY WATER DEPARTMENT
4,704 served1 historical record
A
Large Systems With No Recent Records
MWRA
2,580,000 served1 historical record
A
BOSTON WATER AND SEWER COMMISSION (MWRA)
675,647 served2 historical records
A
WORCESTER DPWP, WATER SUPPLY DIVISION
206,518 served1 historical record
A
SPRINGFIELD WATER AND SEWER COMMISSION
169,170 served1 historical record
A
LOWELL REGIONAL WATER UTILITY
120,418 served1 historical record
A
CAMBRIDGE WATER DEPARTMENT
118,214 served1 historical record
A
QUINCY WATER DEPT. (MWRA)
106,000 served1 historical record
A
BROCKTON WATER DEPARTMENT
105,788 served1 historical record
A
INIMA USA / AQUARIA LLC
105,643 served1 historical record
A
LYNN WATER AND SEWER COMM
101,253 served10 historical records
A
Largest Water Systems in Massachusetts
| Water System | Grade | Population | Historical Records |
|---|---|---|---|
| MWRA | A | 2,580,000 | 1 |
| BOSTON WATER AND SEWER COMMISSION (MWRA) | A | 675,647 | 2 |
| WORCESTER DPWP, WATER SUPPLY DIVISION | A | 206,518 | 1 |
| SPRINGFIELD WATER AND SEWER COMMISSION | A | 169,170 | 1 |
| LOWELL REGIONAL WATER UTILITY | A | 120,418 | 1 |
| CAMBRIDGE WATER DEPARTMENT | A | 118,214 | 1 |
| QUINCY WATER DEPT. (MWRA) | A | 106,000 | 1 |
| BROCKTON WATER DEPARTMENT | A | 105,788 | 1 |
| INIMA USA / AQUARIA LLC | A | 105,643 | 1 |
| LYNN WATER AND SEWER COMM | A | 101,253 | 10 |
| CITY OF NEW BEDFORD DPI | A | 101,079 | 1 |
| FALMOUTH WATER DEPT | A | 97,551 | 1 |
| FALL RIVER WATER DEPARTMENT | A | 94,000 | 1 |
| SALEM AND BEVERLY WATER SUPPLY BOARD | A | 90,330 | 1 |
| LAWRENCE WATER WORKS | A | 89,143 | 2 |
| NEWTON WATER DEPT. (MWRA) | A | 88,931 | 1 |
| SOMERVILLE WATER DEPT. (MWRA) | A | 81,045 | 1 |
| FRAMINGHAM WATER DEPT. (MWRA) | A | 72,362 | 1 |
| MALDEN WATER DIVISION (MWRA) | A | 66,263 | 4 |
| WALTHAM WATER DEPARTMENT | A | 65,218 | 3 |
Contaminants in Massachusetts
Lead in MassachusettsArsenic in MassachusettsNitrate in MassachusettsFluoride in MassachusettsPFOS in MassachusettsPFOA in MassachusettsTHMs in MassachusettsHAA5 in Massachusetts
Cities in Massachusetts
BOSTON(4)CHELSEA(2)WORCESTER(6)SPRINGFIELD(3)BEVERLY(2)LOWELL(2)CAMBRIDGE(1)NORTH DIGHTON(3)DIGHTON(3)QUINCY(1)BROCKTON(1)FALMOUTH(2)LYNN(1)NEW BEDFORD(2)BARNSTABLE(5)FALL RIVER(1)LAWRENCE(1)NEWTON(1)RANDOLPH(2)SOMERVILLE(1)SANDWICH(2)FRAMINGHAM(1)MALDEN(1)WALTHAM(2)SOUTH DENNIS(1)DENNIS(1)BROOKLINE(1)REVERE(1)TAUNTON(1)MEDFORD(1)PLYMOUTH(8)HAVERHILL(1)WEYMOUTH(2)HOLBROOK(2)CHICOPEE(2)WEST PEABODY(1)PEABODY(1)METHUEN(1)OSTERVILLE(1)EVERETT(1)ATTLEBORO(2)ARLINGTON(1)HINGHAM(2)SALEM(2)PITTSFIELD(2)BILLERICA(1)FITCHBURG(1)LEOMINSTER(2)MARLBOROUGH(1)DEDHAM(1)WESTFIELD(2)WOBURN(1)AMHERST(1)CHELMSFORD(4)BRAINTREE(2)HARWICH(1)MILFORD(5)WEST YARMOUTH(1)YARMOUTH(1)SHREWSBURY(1)HOLYOKE(1)GLOUCESTER(1)MATTAPOISETT(2)MASHPEE(3)NATICK(1)ANDOVER(1)BREWSTER(2)WATERTOWN(1)BOURNE(5)DRACUT(2)MIDDLETON(2)HYANNIS(1)LEXINGTON(2)MARSHFIELD(1)TEWKSBURY(2)FRANKLIN(1)ROCKLAND(1)ABINGTON(1)MILLBURY(7)WELLESLEY(3)NORTH ATTLEBOROUGH(2)NEEDHAM(1)BRIDGEWATER(2)NORTH ANDOVER(1)NANTUCKET(2)CHATHAM(1)MELROSE(1)NORWOOD(1)NORTHAMPTON(2)STOUGHTON(2)WEST SPRINGFIELD(3)AGAWAM(1)MILTON(1)DANVERS(1)WAREHAM(3)SAUGUS(1)BELMONT(1)BEDFORD(5)WAKEFIELD(1)READING(1)