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Massachusetts Tap Water Quality: Is It Safe to Drink?

2026 EPA water quality data for 526 community water systems serving a combined 10,050,729 people in Massachusetts. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.

Massachusetts utilities source water primarily from protected surface reservoirs, including the Quabbin and Wachusett Reservoirs that serve metro Boston. PFAS contamination near military installations and fire training sites has prompted aggressive state-level standards. Older cities like Worcester and Springfield face ongoing lead service line replacement.

Find Your Water System in Massachusetts

Enter your ZIP code to see EPA violations, lead test results, PFAS data, and a safety grade for your water.

📊 Data from EPA’s SDWIS · 🔄 Updated quarterly · 🏛️ 526 water systems in Massachusetts

Cities in Massachusetts

BostonWorcesterSpringfieldCambridgeLowellBrocktonQuincyLynnNew BedfordFall RiverNewtonLawrenceSomervilleFraminghamHaverhillMaldenWalthamBrooklineMedfordRevereTauntonWeymouthChicopeePeabodyMethuenBarnstableEverettAttleboroArlingtonSalemPittsfieldLeominsterBeverlyFitchburgMarlboroughWoburnWestfieldChelseaBraintreeHolyokeWatertownRandolphLexingtonAmherstFranklinNeedhamNorwoodNorth AttleboroughWellesleyGloucesterMelroseWest SpringfieldAgawamSaugusBridgewaterMiltonNorthamptonDanversMilfordWakefieldBelmontBurlingtonReadingDedhamWilmingtonStonehamWinchesterGardnerMarbleheadWinthropNewburyportSomersetGreenfieldSouthbridgeAmesburyAbingtonEasthamptonLongmeadowHudsonSwampscottNorth AdamsLynnfieldPalmerWebsterSouth YarmouthHolbrookMaynardNantucketHull

Showing the 250 largest of 526 community water systems in Massachusetts, by population served. Use the ZIP search above or the city links to find a smaller system.

MWRA CHELSEA, MA · 2,660,000 people · Surface Water BOSTON WATER AND SEWER COMMISSION (MWRA) BOSTON, MA · 675,647 people · Surface Water Purchased WORCESTER DPWP, WATER SUPPLY DIVISION WORCESTER, MA · 206,518 people · Surface Water SPRINGFIELD WATER AND SEWER COMMISSION SPRINGFIELD, MA · 167,954 people · Surface Water CAMBRIDGE WATER DEPARTMENT CAMBRIDGE, MA · 118,214 people · Surface Water LOWELL REGIONAL WATER UTILITY LOWELL, MA · 115,000 people · Surface Water QUINCY WATER DEPT. (MWRA) QUINCY, MA · 106,000 people · Surface Water Purchased BROCKTON WATER DEPARTMENT BROCKTON, MA · 105,643 people · Surface Water INIMA USA / AQUARIA LLC NORTH DIGHTON, MA · 105,643 people · Surface Water LYNN WATER AND SEWER COMM LYNN, MA · 101,253 people · Surface Water CITY OF NEW BEDFORD DPI NEW BEDFORD, MA · 101,079 people · Surface Water FALMOUTH WATER DEPT FALMOUTH, MA · 97,551 people · Surface Water FALL RIVER WATER DEPARTMENT FALL RIVER, MA · 94,000 people · Surface Water SALEM AND BEVERLY WATER SUPPLY BOARD BEVERLY, MA · 90,330 people · Surface Water LAWRENCE WATER WORKS LAWRENCE, MA · 88,877 people · Surface Water NEWTON WATER DEPT. (MWRA) NEWTON, MA · 88,415 people · Surface Water Purchased SOMERVILLE WATER DEPT. (MWRA) SOMERVILLE, MA · 81,045 people · Surface Water Purchased FRAMINGHAM WATER DEPT. (MWRA) FRAMINGHAM, MA · 72,362 people · Surface Water Purchased MALDEN WATER DIVISION (MWRA) MALDEN, MA · 66,263 people · Surface Water Purchased WALTHAM WATER DEPARTMENT WALTHAM, MA · 65,218 people · Surface Water Purchased DENNIS WATER DISTRICT SOUTH DENNIS, MA · 65,000 people · Groundwater HAVERHILL WATER DEPT HAVERHILL, MA · 63,235 people · Surface Water BROOKLINE WATER AND SEWER DIVISION BROOKLINE, MA · 63,191 people · Surface Water Purchased REVERE WATER DIVISION (MWRA) REVERE, MA · 62,186 people · Surface Water Purchased TAUNTON WATER DIVISION TAUNTON, MA · 62,165 people · Surface Water MEDFORD WATER DEPT. (MWRA) MEDFORD, MA · 61,700 people · Surface Water Purchased WEYMOUTH WATER DEPARTMENT WEYMOUTH, MA · 57,613 people · Surface Water UPPER CAPE REGIONAL WATER COOPERATIVE SANDWICH, MA · 56,250 people · Groundwater CHICOPEE WATER DEPT (MWRA) CHICOPEE, MA · 55,560 people · Surface Water Purchased PEABODY WATER DEPT. WEST PEABODY, MA · 54,481 people · Surface Water METHUEN WATER DEPT METHUEN, MA · 53,059 people · Surface Water CENTERVILLE OSTERVILLE MARSTONS MILLS WD OSTERVILLE, MA · 50,000 people · Groundwater EVERETT WATER DEPT. (MWRA) EVERETT, MA · 49,075 people · Surface Water Purchased BEVERLY WATER DEPT BEVERLY, MA · 47,461 people · Surface Water Purchased PLYMOUTH WATER DEPARTMENT PLYMOUTH, MA · 46,799 people · Groundwater ATTLEBORO WATER DEPT ATTLEBORO, MA · 46,654 people · Surface Water ARLINGTON WATER DEPT. (MWRA) ARLINGTON, MA · 46,308 people · Surface Water Purchased RANDOLPH/HOLBROOK JOINT WATER BOARD HOLBROOK, MA · 45,767 people · Surface Water WEIR RIVER WATER SYSTEM HINGHAM, MA · 45,339 people · Surface Water SALEM WATER DEPARTMENT SALEM, MA · 44,480 people · Surface Water Purchased PITTSFIELD DPU WATER DEPT PITTSFIELD, MA · 43,927 people · Surface Water BILLERICA WATER WORKS BILLERICA, MA · 42,119 people · Surface Water FITCHBURG DPW DIVISION OF WATER SUPPLY FITCHBURG, MA · 41,946 people · Surface Water MARLBOROUGH DPW WATER DIV. (MWRA) MARLBOROUGH, MA · 41,799 people · Surface Water Purchased LEOMINSTER WATER DIVISION LEOMINSTER, MA · 41,683 people · Surface Water DEDHAM WESTWOOD WATER DIST. DEDHAM, MA · 41,630 people · Surface Water Purchased WESTFIELD DPWWATER DIVISION WESTFIELD, MA · 41,094 people · Surface Water WOBURN WATER DEPT. WOBURN, MA · 40,876 people · Surface Water Purchased AMHERST DPW WATER DIVISION AMHERST, MA · 39,263 people · Surface Water HARWICH WATER DEPARTMENT HARWICH, MA · 39,144 people · Groundwater BRAINTREE WATER AND SEWER DEPT. BRAINTREE, MA · 39,143 people · Surface Water YARMOUTH WATER DEPARTMENT WEST YARMOUTH, MA · 38,900 people · Groundwater SHREWSBURY WATER DEPARTMENT SHREWSBURY, MA · 38,325 people · Groundwater CHELSEA WATER DEPT. (MWRA) CHELSEA, MA · 38,319 people · Surface Water Purchased HOLYOKE WATER WORKS HOLYOKE, MA · 37,838 people · Surface Water GLOUCESTER PUBLIC UTILITY DIVISION GLOUCESTER, MA · 37,440 people · Surface Water NATICK WATER AND SEWER DIVISION NATICK, MA · 37,006 people · Groundwater MASHPEE WATER DISTRICT MASHPEE, MA · 36,922 people · Groundwater ANDOVER WATER DEPT ANDOVER, MA · 36,569 people · Surface Water WATERTOWN WATER DEPT. (MWRA) WATERTOWN, MA · 35,329 people · Surface Water Purchased HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE HYANNIS, MA · 35,000 people · Groundwater BREWSTER WATER DEPARTMENT BREWSTER, MA · 35,000 people · Groundwater RANDOLPH WATER DEPARTMENT RANDOLPH, MA · 34,362 people · Surface Water Purchased LEXINGTON WATER DEPT. (MWRA) LEXINGTON, MA · 34,074 people · Surface Water Purchased MARSHFIELD WATER DEPARTMENT MARSHFIELD, MA · 34,000 people · Groundwater ABINGTON/ROCKLAND JOINT WTR. WORKS ROCKLAND, MA · 33,647 people · Surface Water FRANKLIN WATER DEPARTMENT FRANKLIN, MA · 33,399 people · Groundwater NEEDHAM WATER DEPT NEEDHAM, MA · 33,130 people · Surface Water Purchased TEWKSBURY WATER DEPARTMENT TEWKSBURY, MA · 31,342 people · Surface Water NORTH ANDOVER WATER DEPT NORTH ANDOVER, MA · 30,915 people · Surface Water MILFORD WATER DEPARTMENT MILFORD, MA · 30,379 people · Surface Water CHATHAM WATER DEPARTMENT CHATHAM, MA · 30,000 people · Groundwater NORWOOD WATER DEPT. (MWRA) NORWOOD, MA · 29,909 people · Surface Water Purchased MATTAPOISETT RIVER VALLEY W.D. MATTAPOISETT, MA · 29,600 people · Groundwater Purchased NORTHAMPTON WATER DIVISION NORTHAMPTON, MA · 29,571 people · Surface Water WELLESLEY WATER DIVISION WELLESLEY, MA · 29,550 people · Surface Water Purchased MELROSE WATER DIVISION (MWRA) MELROSE, MA · 29,357 people · Surface Water Purchased STOUGHTON WATER DEPARTMENT STOUGHTON, MA · 29,281 people · Surface Water Purchased NORTH ATTLEBORO WATER DEPT NORTH ATTLEBOROUGH, MA · 28,863 people · Groundwater WEST SPRINGFIELD DPW WATER DIVISION WEST SPRINGFIELD, MA · 28,835 people · Groundwater CHELMSFORD WATER DISTRICT CHELMSFORD, MA · 28,750 people · Groundwater AGAWAM WATER DEPARTMENT AGAWAM, MA · 28,692 people · Surface Water Purchased BRIDGEWATER WATER DEPARTMENT BRIDGEWATER, MA · 28,633 people · Groundwater MILTON WATER DEPT. (MWRA) MILTON, MA · 28,630 people · Surface Water Purchased DANVERS WATER DEPT. MIDDLETON, MA · 28,087 people · Surface Water WANNACOMET WATER COMPANY NANTUCKET, MA · 27,703 people · Groundwater BELMONT WATER DEPT. (MWRA) BELMONT, MA · 27,442 people · Surface Water Purchased READING WATER DEPARTMENT (MWRA) READING, MA · 27,358 people · Surface Water Purchased WAKEFIELD WATER DEPT WAKEFIELD, MA · 27,090 people · Surface Water SAUGUS WATER DEPT. (MWRA) SAUGUS, MA · 27,082 people · Surface Water Purchased BURLINGTON WATER DEPT BURLINGTON, MA · 26,680 people · Surface Water DRACUT WATER SUPPLY DISTRICT DRACUT, MA · 25,808 people · Surface Water Purchased DARTMOUTH WATER DIVISION DARTMOUTH, MA · 24,630 people · Surface Water Purchased WALPOLE WATER DEPT WALPOLE, MA · 24,070 people · Groundwater OAK BLUFFS WATER DISTRICT OAK BLUFFS, MA · 24,000 people · Groundwater MANSFIELD WATER DIVISION MANSFIELD, MA · 23,289 people · Groundwater STONEHAM WATER DEPT (MWRA SUPPLY) STONEHAM, MA · 23,244 people · Surface Water Purchased EASTON WATER DIV SOUTH EASTON, MA · 23,112 people · Groundwater SANDWICH WATER DISTRICT SANDWICH, MA · 23,000 people · Groundwater WINCHESTER WATER DEPT WINCHESTER, MA · 22,970 people · Surface Water BOURNE WATER DISTRICT POCASSET, MA · 22,500 people · Groundwater WILMINGTON WATER DEPT WILMINGTON, MA · 22,481 people · Surface Water Purchased CANTON WATER DEPT CANTON, MA · 22,453 people · Surface Water Purchased PROVINCETOWN WATER DEPARTMENT PROVINCETOWN, MA · 22,250 people · Groundwater WESTBOROUGH WATER DEPARTMENT WESTBOROUGH, MA · 21,567 people · Surface Water WAREHAM FIRE DISTRICT PARKWOOD BEACH, MA · 21,418 people · Groundwater GARDNER WATER DEPARTMENT GARDNER, MA · 21,287 people · Surface Water ACTON WATER SUPPLY DISTRICT ACTON, MA · 20,780 people · GWUDI MARBLEHEAD WATER DEPT. (MWRA) MARBLEHEAD, MA · 20,441 people · Surface Water Purchased NEWBURYPORT WATER DEPARTMENT NEWBURYPORT, MA · 20,335 people · Surface Water HUDSON WATER SUPPLY HUDSON, MA · 20,032 people · Surface Water SALISBURY WATER DIVISION SALISBURY, MA · 20,000 people · Groundwater WINTHROP WATER DIVISION, (MWRA) WINTHROP, MA · 19,316 people · Surface Water Purchased SCITUATE WATER DIVISION SCITUATE, MA · 19,297 people · Surface Water SOUTHBRIDGE WATER DEPARTMENT SOUTHBRIDGE, MA · 19,180 people · Surface Water NORTON WATER DEPARTMENT NORTON, MA · 19,161 people · Groundwater ORLEANS WATER DEPARTMENT ORLEANS, MA · 18,921 people · Groundwater ASHLAND WATER AND SEWER DEPT. ASHLAND, MA · 18,832 people · Groundwater CONCORD WATER DEPT CONCORD, MA · 18,788 people · Surface Water WESTFORD WATER DEPARTMENT WESTFORD, MA · 18,680 people · GWUDI FOXBORO WATER DEPARTMENT FOXBOROUGH, MA · 18,639 people · Groundwater SUDBURY WATER DISTRICT SUDBURY, MA · 18,416 people · Groundwater SOMERSET WATER DEPARTMENT SOMERSET, MA · 18,303 people · Surface Water PEMBROKE WATER DIVISION DPW PEMBROKE, MA · 18,251 people · Groundwater HOLDEN WATER DIVISION, DPW HOLDEN, MA · 17,951 people · Surface Water Purchased WEBSTER WATER DEPARTMENT WEBSTER, MA · 17,776 people · Groundwater GREENFIELD WATER DEPARTMENT GREENFIELD, MA · 17,645 people · Surface Water SWANSEA WATER DISTRICT SWANSEA, MA · 17,375 people · Surface Water AMESBURY DPW WATER DIV. AMESBURY, MA · 17,366 people · Surface Water SHARON WATER DEPT SHARON, MA · 16,846 people · Groundwater DUXBURY WATER DEPARTMENT DUXBURY, MA · 16,387 people · Groundwater NORTH READING WATER DEPT. NORTH READING, MA · 16,379 people · Surface Water Purchased EAST LONGMEADOW DPW WATER DEPT EAST LONGMEADOW, MA · 16,358 people · Surface Water Purchased EASTHAMPTON WATER DEPT EASTHAMPTON, MA · 16,211 people · Groundwater BELLINGHAM DPW WATER SEWER DIVISION BELLINGHAM, MA · 16,061 people · Groundwater LONGMEADOW WATER DEPT LONGMEADOW, MA · 15,853 people · Surface Water Purchased HOLLISTON WATER DEPARTMENT HOLLISTON, MA · 15,713 people · Groundwater CLINTON WATER DEPT CLINTON, MA · 15,530 people · Surface Water MIDDLEBOROUGH WATER SUPPLY MIDDLEBOROUGH, MA · 15,350 people · Groundwater SWAMPSCOTT WATER DEPT. (MWRA) SWAMPSCOTT, MA · 15,175 people · Surface Water Purchased HANOVER WATER DEPT HANOVER, MA · 14,984 people · GWUDI WHITMAN WATER SYSTEM WHITMAN, MA · 14,837 people · Surface Water Purchased SOUTH HADLEY FD #1 (MWRA) SOUTH HADLEY, MA · 14,800 people · Surface Water Purchased KINGSTON WATER DEPARTMENT KINGSTON, MA · 14,712 people · Groundwater SEEKONK WATER DISTRICT SEEKONK, MA · 14,704 people · Groundwater EAST BRIDGEWATER WATER DEPT EAST BRIDGEWATER, MA · 14,526 people · Groundwater FAIRHAVEN WATER DEPT FAIRHAVEN, MA · 14,470 people · Groundwater BEDFORD WATER DEPT. BEDFORD, MA · 14,394 people · Surface Water Purchased NORTHBOROUGH WATER DEPARTMENT (MWRA) NORTHBOROUGH, MA · 13,535 people · Surface Water Purchased WAYLAND WATER DEPARTMENT WAYLAND, MA · 13,196 people · Groundwater MEDWAY WATER DEPARTMENT MEDWAY, MA · 13,115 people · Groundwater IPSWICH DPU WATER DEPT IPSWICH, MA · 13,090 people · Surface Water NORTH ADAMS WATER DEPT NORTH ADAMS, MA · 13,000 people · Surface Water MEDFIELD WATER DEPT. MEDFIELD, MA · 12,894 people · Groundwater HOPKINTON WATER DEPARTMENT HOPKINTON, MA · 12,586 people · Groundwater AUBURN WATER DISTRICT AUBURN, MA · 12,255 people · Surface Water Purchased WRENTHAM WATER DIVISION WRENTHAM, MA · 12,190 people · Groundwater WESTON WATER DEPT. WESTON, MA · 11,941 people · Surface Water Purchased HANSCOM AFB BEDFORD, MA · 11,789 people · Surface Water Purchased UXBRIDGE DPW, WATER DIVISION UXBRIDGE, MA · 11,525 people · Groundwater NORWELL WATER DEPARTMENT NORWELL, MA · 11,495 people · Groundwater HOLBROOK PUBLIC WORKS DEPT HOLBROOK, MA · 11,405 people · Surface Water Purchased ASH/WIN JOINT WATER AUTHORITY ASHBURNHAM, MA · 11,394 people · Surface Water AQUARION WATER COMPANY, MILLBURY MILLBURY, MA · 11,326 people · Surface Water Purchased GRAFTON WATER DISTRICT GRAFTON, MA · 10,925 people · Groundwater RAYNHAM CENTER WATER DISTRICT RAYNHAM, MA · 10,824 people · Groundwater ATHOL DPW WATER DIVISION ATHOL, MA · 10,587 people · Groundwater SOUTHBOROUGH DPW WATER DIVISION (MWRA) SOUTHBOROUGH, MA · 10,514 people · Surface Water Purchased MAYNARD DPW, WATER DIVISION MAYNARD, MA · 10,401 people · Groundwater WARE WATER DEPT WARE, MA · 10,066 people · Groundwater ROCKPORT WATER DEPT ROCKPORT, MA · 10,000 people · Surface Water BLACKSTONE WATER DEPARTMENT BLACKSTONE, MA · 9,868 people · Groundwater LENOX DPW WATER DIVISION LENOX, MA · 9,800 people · Surface Water KENWOOD WATER DISTRICT DRACUT, MA · 9,620 people · Surface Water Purchased LITTLETON WATER DEPARTMENT LITTLETON, MA · 9,611 people · Groundwater HANSON WATER DEPARTMENT HANSON, MA · 9,546 people · Surface Water Purchased PEPPERELL DPW WATER DIVISION PEPPERELL, MA · 9,217 people · Groundwater AQUARION WATER COMPANY, PINEHILLS MILLBURY, MA · 9,195 people · Groundwater MILLIS WATER DEPT MILLIS, MA · 9,002 people · Groundwater PLAINVILLE WATER DEPARTMENT PLAINVILLE, MA · 8,805 people · GWUDI GEORGETOWN WATER DEPARTMENT GEORGETOWN, MA · 8,766 people · Groundwater LYNNFIELD CENTER WATER DISTRICT LYNNFIELD, MA · 8,569 people · Surface Water Purchased WILBRAHAM WATER DEPT (MWRA) WILBRAHAM, MA · 8,533 people · Surface Water Purchased AYER DPW WATER DIVISION AYER, MA · 8,479 people · Groundwater ACUSHNET WATER DEPARTMENT ACUSHNET, MA · 8,384 people · Surface Water Purchased TURNERS FALLS WATER DEPT TURNERS FALLS, MA · 8,080 people · Groundwater EDGARTOWN WATER DEPARTMENT EDGARTOWN, MA · 8,027 people · Groundwater WHITINSVILLE WATER COMPANY WHITINSVILLE, MA · 7,933 people · GWUDI NORTHBRIDGE WATER DIVISION NORTHBRIDGE, MA · 7,889 people ADAMS FIRE DISTRICT ADAMS, MA · 7,851 people · Groundwater WEST BRIDGEWATER WATER DEPT WEST BRIDGEWATER, MA · 7,709 people · Groundwater BUZZARDS BAY WATER DISTRICT BOURNE, MA · 7,700 people · Groundwater MATTAPOISETT WATER DEPARTMENT MATTAPOISETT, MA · 7,685 people · Groundwater SOUTHWICK WATER DEPT SOUTHWICK, MA · 7,646 people · Surface Water Purchased NORFOLK WATER DIVISION NORFOLK, MA · 7,602 people · Groundwater COHASSET WATER DEPT COHASSET, MA · 7,555 people · Surface Water HALIFAX WATER DEPARTMENT HALIFAX, MA · 7,553 people · Surface Water Purchased NORTH CHELMSFORD WATER DIST NORTH CHELMSFORD, MA · 7,498 people · Groundwater HAMILTON WATER DEPT HAMILTON, MA · 7,377 people · Groundwater AQUARION WATER COMPANY OXFORD MILLBURY, MA · 7,343 people · Groundwater WILLIAMSTOWN WATER DEPT WILLIAMSTOWN, MA · 7,326 people · Groundwater MIDDLETON WATER DEPT. MIDDLETON, MA · 7,255 people · Surface Water Purchased LUNENBURG WATER DISTRICT LUNENBURG, MA · 7,219 people · Groundwater MERRIMAC WATER DEPARTMENT MERRIMAC, MA · 7,193 people · Groundwater WEST BOYLSTON WATER DISTRICT WEST BOYLSTON, MA · 7,132 people · Surface Water Purchased SPENCER WATER DEPARTMENT SPENCER, MA · 7,037 people · Groundwater STERLING WATER DEPARTMENT STERLING, MA · 6,754 people · Groundwater GROVELAND WATER DEPARTMENT GROVELAND, MA · 6,743 people · Groundwater ORANGE WATER DEPT ORANGE, MA · 6,526 people · Surface Water Purchased DEVENS MASSDEVELOPMENT DEVENS, MA · 6,500 people · Groundwater TOWNSEND WATER DEPARTMENT TOWNSEND, MA · 6,500 people · Groundwater DALTON FIRE DISTRICT DALTON, MA · 6,330 people · Surface Water Purchased ROWLEY WATER DEPARTMENT ROWLEY, MA · 6,283 people · Groundwater SOUTH HADLEY FIRE DISTRICT #2 WATER DEPT SOUTH HADLEY, MA · 6,200 people · Groundwater TOWN OF EASTHAM EASTHAM, MA · 6,199 people · Groundwater TEMPLETON MUNIC. LIGHT AND WATER PLANT BALDWINVILLE, MA · 6,152 people · Groundwater TISBURY WATER WORKS TISBURY, MA · 6,082 people · Groundwater HOPEDALE WATER DEPARTMENT HOPEDALE, MA · 6,017 people · Surface Water Purchased LANCASTER WATER DEPARTMENT LANCASTER, MA · 6,000 people · Groundwater OTIS AIR NATIONAL GUARD BASE BUZZARDS BAY, MA · 6,000 people · Groundwater MARION WATER DIVISION MARION, MA · 5,761 people · Groundwater WINCHENDON WATER DEPARTMENT WINCHENDON, MA · 5,706 people · Surface Water Purchased RUTLAND WATER DEPARTMENT RUTLAND, MA · 5,605 people · Surface Water LINCOLN WATER DEPT LINCOLN, MA · 5,593 people · Surface Water DUDLEY WATER DEPARTMENT DUDLEY, MA · 5,515 people · Groundwater GROTON WATER DEPARTMENT GROTON, MA · 5,456 people · Groundwater TOPSFIELD WATER DEPARTMENT TOPSFIELD, MA · 5,435 people · Groundwater LEE WATER DEPT LEE, MA · 5,420 people · Surface Water BARNSTABLE FIRE DISTRICT BARNSTABLE, MA · 5,400 people · Groundwater ONSET FIRE DISTRICTWATER DEPT. ONSET, MA · 5,392 people · Groundwater DIGHTON WATER DISTRICT NORTH DIGHTON, MA · 5,264 people · Surface Water Purchased MANCHESTER BY THE SEA DPW MANCHESTER BY THE SEA, MA · 5,170 people · Surface Water COTUIT FIRE DISTRICT WATER DEPARTMENT COTUIT, MA · 4,938 people · Groundwater SOUTHAMPTON WATER DEPT SOUTHAMPTON, MA · 4,853 people LYNNFIELD WATER DIST. (MWRA) LYNNFIELD, MA · 4,820 people · Surface Water Purchased HADLEY DPW WATER DIVISION HADLEY, MA · 4,819 people · Groundwater PALMER WATER DISTRICT NO.1 PALMER, MA · 4,789 people · Surface Water TOWN OF AVON AVON, MA · 4,777 people · Groundwater NORTH SAGAMORE WATER DISTRICT SAGAMORE BEACH, MA · 4,668 people · Groundwater STURBRIDGE WATER DEPARTMENT STURBRIDGE, MA · 4,567 people · GWUDI UPTON DPW WATER/WASTEWATER DIVISION UPTON, MA · 4,420 people · Groundwater TYNGSBOROUGH WATER DISTRICT TYNGSBOROUGH, MA · 4,416 people · Surface Water Purchased DOUGLAS WATER DEPARTMENT DOUGLAS, MA · 4,400 people · Groundwater GREAT BARRINGTON FIRE DIST GREAT BARRINGTON, MA · 4,375 people · Groundwater PAXTON WATER DEPARTMENT PAXTON, MA · 4,300 people · Surface Water Purchased MONSON WATER AND SEWER DEPT MONSON, MA · 4,212 people · Groundwater SHIRLEY WATER DISTRICT SHIRLEY, MA · 4,121 people · Groundwater BARRE WATER DEPARTMENT BARRE, MA · 4,098 people · Groundwater WENHAM WATER DEPT. WENHAM, MA · 3,942 people · Groundwater NORTH BROOKFIELD WATER DEPARTMENT NORTH BROOKFIELD, MA · 3,903 people · Surface Water

Massachusetts Drinking Water: Frequently Asked Questions

Is Massachusetts tap water safe to drink?

Massachusetts has 526 community water systems regulated by the EPA serving a combined 10,050,729 people. Water quality varies by system — search above to find your specific utility and see its violation history, lead test results, and safety grade.

How many water systems are in Massachusetts?

There are 526 EPA-regulated community water systems in Massachusetts serving a combined 10,050,729 people. Each system is required to test for over 90 contaminants and publicly report any violations.

Does Massachusetts have PFAS in its drinking water?

PFAS (forever chemicals) have been detected in water systems across the country, including Massachusetts. The EPA finalized enforceable PFAS limits in 2024. Search for your specific water system above to see if PFAS were detected and whether levels exceed the new federal limits.

EPA data last updated: 2026-07-12