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Employer directory · Maryland

Public water systems in Maryland

69 public water systems in Maryland, 33rd 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
WASHINGTON SUBURBAN SANITARY COMMISSION1,900,000
CITY OF BALTIMORE1,600,000
GLEN BURNIE-BROADNECK290,606
HOWARD COUNTY D.P.W. DISTRIBUTION286,158
HARFORD COUNTY D.P.W.104,567
CITY OF HAGERSTOWN92,200
WALDORF - CHARLES COUNTY DPW84,296
NEW DESIGN - FREDERICK COUNTY74,911
CROFTON-ODENTON62,986
FORT GEORGE G. MEADE62,234
CITY OF FREDERICK54,000
CITY OF ROCKVILLE52,000
LEXINGTON PARK43,030
CITY OF WESTMINSTER35,256
CITY OF ANNAPOLIS35,000
CITY OF SALISBURY30,343
TOWN OF OCEAN CITY30,000
CITY OF CUMBERLAND27,039
BROAD CREEK26,033
CITY OF BOWIE25,000
FREEDOM DISTRICT24,867
PATUXENT NAVAL AIR STATION (NAVFAC-WASH)22,000
CITY OF ABERDEEN18,006
EASTON UTILITIES17,357
TOWN OF ELKTON15,625
CHAPEL HILL - ABERDEEN PROVING GROUNDS15,000
CITY OF CAMBRIDGE WATER15,000
CITY OF HAVRE DE GRACE14,000
OCEAN PINES11,890
TOWN OF LA PLATA11,535
CITY OF FROSTBURG11,000
TOWN OF MOUNT AIRY9,890
STEVENSVILLE9,155
U.S. NAVAL ACADEMY8,700
TOWN OF NORTH EAST8,600
TOWN OF WALKERSVILLE8,440
FORT DETRICK7,900
CITY OF BRUNSWICK7,312
CITY OF TANEYTOWN6,750
TOWN OF HAMPSTEAD6,600
BRYANS ROAD6,260
TOWN OF THURMONT6,200
TOWN OF POOLESVILLE6,005
MYSTIC HARBOUR5,945
CITY OF FRUITLAND5,907
EASTERN REGION ALLEGANY DISTRIB. SYSTEM5,703
DEEP CREEK LAKE WATER SERVICE AREA5,502
LAVALE SANITARY COMMISSION5,500
TOWN OF CHESTERTOWN5,400
MIDLAND-LONACONING5,000
TOWN OF CHESAPEAKE BEACH5,000
TOWN OF LEONARDTOWN5,000
WESTERN REGION ALLEGANY DISTRIB. SYSTEM4,955
TOWN OF MANCHESTER4,954
TOWN OF BERLIN4,500
TOWN OF DELMAR4,500
TOWN OF DENTON4,500
TOWN OF PERRYVILLE4,413
PRINCE FREDERICK4,371
TOWN OF MIDDLETOWN4,288
BOONSBORO - KEEDYSVILLE4,250
CITY OF POCOMOKE CITY4,100
TOWN OF INDIAN HEAD4,100
SOLOMONS3,811
TOWN OF CHARLESTOWN3,791
EASTERN CORRECTIONAL INSTITUTE3,500
ELKTON WEST3,500
TOWN OF CENTREVILLE3,322
NAVAL SUPPORT FACILITY, INDIAN HEAD3,321

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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Other employers in Maryland

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Public water systems in other states

Texas · 1,133California · 523Illinois · 408Alabama · 294Florida · 286Michigan · 284Tennessee · 276New York · 266Pennsylvania · 259Massachusetts · 254Ohio · 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 · 82Arizona · 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. · Maryland government jobs