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Infrastructure
Bridge Safety 624,000 bridge inspections Aviation Safety 30,000+ NTSB aviation events Dam Safety 92,600 dam safety records Water Safety 433,000+ public water systems Railroad Safety 438,000+ rail crossings Pipeline Safety 8,800+ pipeline incidents
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Browse Water Systems

7,870 public water systems in MD.

Public Water Systems Database

Browse 7,870 EPA-regulated public water systems with identifiers, population served, and water source type. Use the filters below to narrow results by state, system type, or name.

System Name PWSID State Type Population Served
WASHINGTON SUBURBAN SANITARY COMMISSION MD0150005 Maryland Community 1,900,000
BALTIMORE CITY-BUREAU WATER SU MD0002208 Maryland Community 1,755,000
CITY OF BALTIMORE MD0300002 Maryland Community 1,600,000
WASHINGTON SUBURBAN SANITARY C MD0002489 Maryland Community 1,300,000
PATUXEUNT PLANT WSSC MD0000030 Maryland Community 1,300,000
POTOMAC PLANT WSSC MD0000027 Maryland Community 1,300,000
ASHBURTON MD0300001 Maryland Community 500,000
BALTIMORE CITY MUNICIPAL WORKS MD0030013 Maryland Community 500,000
BALTIMORE CITY MUNICIPAL WORKS MD0002906 Maryland Community 500,000
WSSC (INCLUDED IN 0150005) MD0160014 Maryland Community 482,000
GLEN BURNIE-BROADNECK MD0020017 Maryland Community 290,606
HOWARD COUNTY D.P.W. DISTRIBUTION MD0130002 Maryland Community 286,158
ARNOLD WTP % ANNAPOLIS DPW MD0002869 Maryland Community 150,000
OCEAN CITY MD0002623 Maryland Community 150,000
HARFORD COUNTY D.P.W. MD0120016 Maryland Community 104,567
CITY OF HAGERSTOWN MD0210010 Maryland Community 92,200
WALDORF - CHARLES COUNTY DPW MD0080049 Maryland Community 84,296
GLEN BURNIE ANNE ARUNDEL CO MD0002429 Maryland Community 78,000
HARVNDALE PLANT MD0000081 Maryland Community 75,000
NEW DESIGN - FREDERICK COUNTY MD0100030 Maryland Community 74,911
INDIVIDUAL WELL PLANT MD0000080 Maryland Community 72,204
HAGERSTOWN MD0002453 Maryland Community 70,000
CROFTON-ODENTON MD0020008 Maryland Community 62,986
FORT GEORGE G. MEADE MD0020012 Maryland Community 62,234
ELLIC. CITY-COLUMBIA HWD CO DP MD0002359 Maryland Community 59,500
CITY OF FREDERICK MD0100015 Maryland Community 54,000
ELLICOTT CITY MD0130003 Maryland Community 46,000
LEXINGTON PARK MD0180007 Maryland Community 43,030
ROCKVILLE FILTRATION PLANT MD0002717 Maryland Community 40,000
CUMBERLAND-EVITTS CREEK WATER MD0002301 Maryland Community 40,000
ANNAPOLIS MD0002191 Maryland Community 40,000
FORT GEORGE MEADE MD0000082 Maryland Community 40,000
CITY OF WESTMINSTER MD0060015 Maryland Community 35,256
CITY OF ANNAPOLIS MD0020001 Maryland Community 35,000
BELAIR-BOWIE MD0002242 Maryland Community 32,000
BELAIR-BOWIE WATER TREATMENT MD0000710 Maryland Community 31,000
CITY OF SALISBURY MD0220004 Maryland Community 30,343
TOWN OF OCEAN CITY MD0230003 Maryland Community 30,000
FREDERICK MD0002388 Maryland Community 28,000
CITY OF CUMBERLAND MD0010008 Maryland Community 27,039
SEVERNA PARK-ANNE ARUNDEL CO MD0002439 Maryland Community 26,228
SEVERNDALE PLANT MD0000079 Maryland Community 26,228
CITY OF BOWIE MD0160002 Maryland Community 25,000
FORT FOOTE PLANT WSSC MD0000029 Maryland Community 25,000
FREEDOM DISTRICT MD0060002 Maryland Community 24,867
BROAD CREEK MD0020004 Maryland Community 23,179
PATUXENT NAVAL AIR STATION (NAVFAC-WASH) MD0180022 Maryland Community 22,000
SALISBURY MD0002724 Maryland Community 20,000
CAMBRIDGE MD0002253 Maryland Community 19,000
CITY OF ABERDEEN MD0120001 Maryland Community 18,006