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Public water systems in Massachusetts

254 public water systems in Massachusetts, 10th among the states. Community drinking-water systems owned by a local, state or federal government and serving 3,301 people or more, from EPA's Safe Drinking Water Information System. Private and tribal systems are not included.

Public water systemPopulation served
MWRA2,580,000
BOSTON WATER AND SEWER COMMISSION (MWRA)675,647
WORCESTER DPWP, WATER SUPPLY DIVISION206,518
SPRINGFIELD WATER AND SEWER COMMISSION169,170
LOWELL REGIONAL WATER UTILITY120,418
CAMBRIDGE WATER DEPARTMENT118,214
QUINCY WATER DEPT. (MWRA)106,000
BROCKTON WATER DEPARTMENT105,788
LYNN WATER AND SEWER COMM101,253
CITY OF NEW BEDFORD DPI101,079
FALMOUTH WATER DEPT97,551
FALL RIVER WATER DEPARTMENT94,000
SALEM AND BEVERLY WATER SUPPLY BOARD90,330
LAWRENCE WATER WORKS89,143
NEWTON WATER DEPT. (MWRA)88,931
SOMERVILLE WATER DEPT. (MWRA)81,045
FRAMINGHAM WATER DEPT. (MWRA)72,362
MALDEN WATER DIVISION (MWRA)66,263
WALTHAM WATER DEPARTMENT65,218
DENNIS WATER DISTRICT65,000
BROOKLINE WATER AND SEWER DIVISION63,191
REVERE WATER DIVISION (MWRA)62,186
TAUNTON WATER DIVISION62,165
MEDFORD WATER DEPT. (MWRA)61,700
HAVERHILL WATER DEPT61,277
WEYMOUTH WATER DEPARTMENT57,871
UPPER CAPE REGIONAL WATER COOPERATIVE56,250
CHICOPEE WATER DEPT (MWRA)55,560
PEABODY WATER DEPT.54,481
METHUEN WATER DEPT53,059
CENTERVILLE OSTERVILLE MARSTONS MILLS WD50,000
EVERETT WATER DEPT. (MWRA)49,075
BEVERLY WATER DEPT47,461
PLYMOUTH WATER DEPARTMENT47,100
RANDOLPH/HOLBROOK JOINT WATER BOARD46,519
ATTLEBORO WATER DEPT46,461
ARLINGTON WATER DEPT. (MWRA)46,308
WEIR RIVER WATER SYSTEM45,339
SALEM WATER DEPARTMENT44,480
PITTSFIELD DPU WATER DEPT43,927
BILLERICA WATER WORKS42,119
FITCHBURG DPW DIVISION OF WATER SUPPLY41,946
MARLBOROUGH DPW WATER DIV. (MWRA)41,799
LEOMINSTER WATER DIVISION41,683
DEDHAM WESTWOOD WATER DIST.41,630
WESTFIELD DPWWATER DIVISION41,094
WOBURN WATER DEPT.40,876
CHELSEA WATER DEPT. (MWRA)40,787
AMHERST DPW WATER DIVISION39,263
HARWICH WATER DEPARTMENT39,144
BRAINTREE WATER AND SEWER DEPT.39,143
YARMOUTH WATER DEPARTMENT38,900
SHREWSBURY WATER DEPARTMENT38,325
HOLYOKE WATER WORKS37,838
GLOUCESTER PUBLIC UTILITY DIVISION37,440
NATICK WATER AND SEWER DIVISION37,006
MASHPEE WATER DISTRICT36,922
ANDOVER WATER DEPT36,569
WATERTOWN DEPARTMENT OF PUBLIC WORKS35,985
RANDOLPH WATER DEPARTMENT35,114
BREWSTER WATER DEPARTMENT35,000
HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE35,000
LEXINGTON WATER DEPT. (MWRA)34,074
MARSHFIELD WATER DEPARTMENT34,000
FRANKLIN WATER DEPARTMENT33,706
ABINGTON/ROCKLAND JOINT WTR. WORKS33,387
NEEDHAM WATER DEPT31,664
NORTH ATTLEBORO WATER DEPT31,410
TEWKSBURY WATER DEPARTMENT31,342
NORTH ANDOVER WATER DEPT30,915
MILFORD WATER DEPARTMENT30,379
CHATHAM WATER DEPARTMENT30,000
MELROSE WATER DIVISION (MWRA)29,938
NORWOOD WATER DEPT. (MWRA)29,909
MATTAPOISETT RIVER VALLEY W.D.29,600
NORTHAMPTON WATER DIVISION29,571
WELLESLEY WATER DIVISION29,550
STOUGHTON WATER DEPARTMENT29,281
WEST SPRINGFIELD DPW WATER DIVISION28,835
CHELMSFORD WATER DISTRICT28,750
AGAWAM WATER DEPARTMENT28,692
BRIDGEWATER WATER DEPARTMENT28,633
MILTON WATER DEPT. (MWRA)28,630
DANVERS WATER DEPT.28,087
SAUGUS WATER DEPT. (MWRA)27,844
WANNACOMET WATER COMPANY27,703
BELMONT WATER DEPT. (MWRA)27,442
WAKEFIELD WATER DEPT27,090
READING WATER DEPARTMENT (MWRA)26,262
BURLINGTON WATER DEPT25,864
DRACUT WATER SUPPLY DISTRICT25,808
EASTON WATER DIV25,058
DARTMOUTH WATER DIVISION24,696
WALPOLE WATER DEPT24,070
OAK BLUFFS WATER DISTRICT24,000
STONEHAM WATER DEPT (MWRA SUPPLY)23,244
SANDWICH WATER DISTRICT23,000
WINCHESTER WATER DEPT22,970
CANTON WATER DEPT22,766
BOURNE WATER DISTRICT22,500
PROVINCETOWN WATER DEPARTMENT22,250
MANSFIELD WATER DIVISION21,797
WILMINGTON WATER DEPT21,654
WESTBOROUGH WATER DEPARTMENT21,567
GARDNER WATER DEPARTMENT21,381
ACTON WATER SUPPLY DISTRICT21,285
MARBLEHEAD WATER DEPT. (MWRA)20,441
NEWBURYPORT WATER DEPARTMENT20,335
WAREHAM FIRE DISTRICT20,102
HUDSON WATER SUPPLY20,032
SOUTHBRIDGE WATER DEPARTMENT19,562
WINTHROP WATER DIVISION, (MWRA)19,316
SCITUATE WATER DIVISION19,297
NORTON WATER DEPARTMENT19,161
WESTFORD WATER DEPARTMENT18,848
ASHLAND WATER AND SEWER DEPT.18,832
CONCORD WATER DEPT18,788
FOXBORO WATER DEPARTMENT18,721
SUDBURY WATER DISTRICT18,416
SOMERSET WATER DEPARTMENT18,303
PEMBROKE WATER DIVISION DPW18,175
HOLDEN WATER DIVISION, DPW18,016
WEBSTER WATER DEPARTMENT17,776
GREENFIELD WATER DEPARTMENT17,768
ORLEANS WATER DEPARTMENT17,460
SWANSEA WATER DISTRICT17,375
AMESBURY DPW WATER DIV.17,366
SHARON WATER DEPT16,846
BELLINGHAM DPW WATER SEWER DIVISION16,556
DUXBURY WATER DEPARTMENT16,387
NORTH READING WATER DEPT.16,379
EAST LONGMEADOW DPW WATER DEPT16,358
EASTHAMPTON WATER DEPT16,211
LONGMEADOW WATER DEPT15,853
CLINTON WATER DEPT15,428
MIDDLEBOROUGH WATER SUPPLY15,350
SWAMPSCOTT WATER DEPT. (MWRA)15,300
FAIRHAVEN WATER DEPT15,155
HOLLISTON WATER DEPARTMENT15,139
HANOVER WATER DEPT14,984
BEDFORD WATER DEPT.14,955
WHITMAN WATER SYSTEM14,947
SOUTH HADLEY FD #1 (MWRA)14,800
KINGSTON WATER DEPARTMENT14,715
EAST BRIDGEWATER WATER DEPT14,526
MEDWAY WATER DEPARTMENT14,176
WAYLAND WATER DEPARTMENT14,096
SEEKONK WATER DISTRICT13,801
NORTHBOROUGH WATER DEPARTMENT (MWRA)13,551
IPSWICH DPU WATER DEPT13,138
NORTH ADAMS WATER DEPT13,000
MEDFIELD WATER DEPT.12,713
HOPKINTON WATER DEPARTMENT12,680
AUBURN WATER DISTRICT12,255
WRENTHAM WATER DIVISION12,190
HANSCOM AFB11,789
UXBRIDGE DPW, WATER DIVISION11,612
NORWELL WATER DEPARTMENT11,495
HOLBROOK PUBLIC WORKS DEPT11,405
ASH/WIN JOINT WATER AUTHORITY11,394
WESTON WATER DEPT.11,391
RAYNHAM CENTER WATER DISTRICT10,964
GRAFTON WATER DISTRICT10,925
SOUTHBOROUGH DPW WATER DIVISION (MWRA)10,638
MAYNARD DPW, WATER DIVISION10,616
ATHOL DPW WATER DIVISION10,587
WARE WATER DEPT10,066
ROCKPORT WATER DEPT10,000
LENOX DPW WATER DIVISION9,800
KENWOOD WATER DISTRICT9,620
HANSON WATER DEPARTMENT9,612
BLACKSTONE WATER DEPARTMENT9,463
SALISBURY WATER DIVISION9,334
LITTLETON WATER DEPARTMENT9,307
PEPPERELL DPW WATER DIVISION9,217
MILLIS WATER DEPT9,055
PLAINVILLE WATER DEPARTMENT8,805
GEORGETOWN WATER DEPARTMENT8,766
WILBRAHAM WATER DEPT (MWRA)8,533
LYNNFIELD CENTER WATER DISTRICT8,525
AYER DPW WATER DIVISION8,479
ACUSHNET WATER DEPARTMENT8,430
NORTHBRIDGE WATER DIVISION8,127
TURNERS FALLS WATER DEPT8,080
EDGARTOWN WATER DEPARTMENT8,027
ADAMS FIRE DISTRICT7,945
WEST BRIDGEWATER WATER DEPT7,709
BUZZARDS BAY WATER DISTRICT7,700
MATTAPOISETT WATER DEPARTMENT7,685
HAMILTON WATER DEPT7,674
SOUTHWICK WATER DEPT7,669
NORTH CHELMSFORD WATER DIST7,660
NORFOLK WATER DIVISION7,602
HALIFAX WATER DEPARTMENT7,575
COHASSET WATER DEPT7,555
WILLIAMSTOWN WATER DEPT7,326
MIDDLETON WATER DEPT.7,291
LUNENBURG WATER DISTRICT7,219
SPENCER WATER DEPARTMENT7,037
MERRIMAC WATER DEPARTMENT6,988
WEST BOYLSTON WATER DISTRICT6,919
TOWNSEND WATER DEPARTMENT6,832
STERLING WATER DEPARTMENT6,715
ORANGE WATER DEPT6,526
GROVELAND WATER DEPARTMENT6,508
DEVENS MASSDEVELOPMENT6,500
DALTON FIRE DISTRICT6,330
SOUTH HADLEY FIRE DISTRICT #2 WATER DEPT6,200
TOWN OF EASTHAM6,199
ROWLEY WATER DEPARTMENT6,161
TEMPLETON MUNIC. LIGHT AND WATER PLANT6,159
MARION WATER DIVISION6,119
TISBURY WATER WORKS6,082
RUTLAND WATER DEPARTMENT6,025
HOPEDALE WATER DEPARTMENT6,017
LANCASTER WATER DEPARTMENT6,000
OTIS AIR NATIONAL GUARD BASE6,000
WINCHENDON WATER DEPARTMENT5,706
LEE WATER DEPT5,686
LINCOLN WATER DEPT5,593
DUDLEY WATER DEPARTMENT5,515
GROTON WATER DEPARTMENT5,456
TOPSFIELD WATER DEPARTMENT5,435
BARNSTABLE FIRE DISTRICT5,400
ONSET FIRE DISTRICTWATER DEPT.5,392
DIGHTON WATER DISTRICT5,280
MANCHESTER BY THE SEA DPW5,201
COTUIT FIRE DISTRICT WATER DEPARTMENT4,938
SOUTHAMPTON WATER DEPT4,853
LYNNFIELD WATER DIST. (MWRA)4,820
HADLEY DPW WATER DIVISION4,819
PALMER WATER DISTRICT NO.14,789
TOWN OF AVON4,777
STURBRIDGE WATER DEPARTMENT4,746
WEST NEWBURY WATER DEPARTMENT4,704
NORTH SAGAMORE WATER DISTRICT4,668
UPTON DPW WATER/WASTEWATER DIVISION4,420
TYNGSBOROUGH WATER DISTRICT4,416
DOUGLAS WATER DEPARTMENT4,400
GREAT BARRINGTON FIRE DIST4,380
PAXTON WATER DEPARTMENT4,300
MONSON WATER AND SEWER DEPT4,222
SHIRLEY WATER DISTRICT4,165
WENHAM WATER DEPT.3,942
NORTH RAYNHAM WATER DISTRICT3,902
WESTMINSTER DEPARTMENT OF PUBLIC WORKS3,889
NORTH BROOKFIELD WATER DEPARTMENT3,863
SOUTH DEERFIELD WATER SUPPLY DISTRICT3,800
CHERRY VALLEY/ ROCHDALE WATER DISTRICT3,696
ASHBURNHAM WATER DEPARTMENT3,680
ESSEX WATER DEPT.3,675
MCI SHIRLEY3,500
BOYLSTON WATER DISTRICT3,343
NAHANT WATER DEPT. (MWRA)3,334

Largest first by population served, as each employer reports it to its federal registry.

Source: U.S. Environmental Protection Agency, Safe Drinking Water Information System (SDWIS/Fed), community water systems. Data captured October 2, 2026.

Jobs at public water systems

Water / Wastewater Treatment Operator

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Public water systems in other states

Texas · 1,133California · 523Illinois · 408Alabama · 294Florida · 286Michigan · 284Tennessee · 276New York · 266Pennsylvania · 259Ohio · 243Georgia · 242North Carolina · 237Washington · 211New Jersey · 205Missouri · 200Kentucky · 190Louisiana · 190Minnesota · 185Wisconsin · 185Indiana · 176Colorado · 167Arkansas · 157South Carolina · 143Oklahoma · 142Virginia · 142Utah · 116Iowa · 112Oregon · 111Mississippi · 107Kansas · 88West Virginia · 82Maryland · 69Arizona · 63New Mexico · 53Idaho · 43Nebraska · 43New Hampshire · 38Hawaii · 34Montana · 32Vermont · 32Maine · 31South Dakota · 31Connecticut · 30Nevada · 28Wyoming · 28Rhode Island · 26Delaware · 20North Dakota · 18Alaska · 16District of Columbia · 3

All public water systems in the U.S. · Massachusetts government jobs