Browse Water Systems

433,698 public water systems.

Public Water Systems Database

Browse 433,698 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
ROP CENTER CA2000756 Non-Transient Non-Community 9,000,000
GRIFFITH PARK CA1907037 California Transient Non-Community 9,000,000
NEW YORK CITY SYSTEM NY7003493 New York Community 8,271,000
LOS ANGELES-CITY, DEPT. OF WATER & POWER CA1910067 California Community 7,751,132
ROY'S BLOOMINGDALE TAVERN IL0041483 Illinois Transient Non-Community 6,010,890
CITY OF HOUSTON TX1010013 Texas Community 2,970,543
CHICAGO IL0316000 Illinois Community 2,746,388
MWRA MA6000000 Massachusetts Community 2,660,000
MDWASA - MAIN SYSTEM FL4130871 Florida Community 2,377,460
SAN ANTONIO WATER SYSTEM TX0150018 Texas Community 2,113,151
NEW YORK STATE FAIR NY3330032 New York Transient Non-Community 2,000,000
PHILADELPHIA WATER DEPARTMENT PA1510004 Pennsylvania Community 1,950,098
WASHINGTON SUBURBAN SANITARY COMMISSION MD0150005 Maryland Community 1,900,000
BALTIMORE CITY-BUREAU WATER SU MD0002208 Maryland Community 1,755,000
PHOENIX CITY OF AZ0407025 Arizona Community 1,695,000
PHILADELPHIA WATER DEPARTMENT PA1510001 Pennsylvania Community 1,600,000
CITY OF BALTIMORE MD0300002 Maryland Community 1,600,000
LAS VEGAS VALLEY WATER DISTRICT NV0000090 Nevada Community 1,539,277
EAST BAY MUD CA0110005 California Community 1,442,800
SAN DIEGO, CITY OF CA3710020 California Community 1,385,379
DALLAS WATER UTILITY TX0570004 Texas Community 1,356,479
CLEVELAND PUBLIC WATER SYSTEM OH1801212 Ohio Community 1,308,955
COLUMBUS PUBLIC WATER SYSTEM OH2504412 Ohio Community 1,305,946
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
DENVER WATER BOARD CO0116001 Colorado Community 1,287,000
CHARLOTTE WATER NC0160010 North Carolina Community 1,163,701
SEATTLE PUBLIC UTILITIES WA5377050 Washington Community 1,161,961
FAIRFAX COUNTY WATER AUTHORITY VA6059501 Virginia Community 1,121,613
CITY OF AUSTIN WATER & WASTEWATER TX2270001 Texas Community 1,115,323
MO AMERICAN ST LOUIS ST CHARLES COUNTIES MO6010716 Missouri Community 1,111,000
SUFFOLK COUNTY WATER AUTHORITY NY5110526 New York Community 1,100,000
ATLANTA GA1210001 Georgia Community 1,089,893
METROPOLITANO PR0002591 PR Community 1,077,332
SAN JOSE WATER CA4310011 California Community 1,039,920
NEW YORK CITY - CROTON SYSTEM NY7003666 New York Community 1,000,000
GWINNETT CO. DEPT. OF WATER RESOURCES GA1350004 Georgia Community 975,000
CITY OF FORT WORTH TX2200012 Texas Community 955,900
OVALTINE PRODUCTS IL0039214 Illinois Transient Non-Community 900,500
PHILADELPHIA SUBURBAN WATER CO PA1460021 Pennsylvania Community 900,000
CITIZENS WATER - INDIANAPOLIS IN5249004 Indiana Community 880,345
SFPUC CITY DISTRIBUTION DIVISION CA3810011 California Community 848,019
JEA MAJOR GRID FL2161328 Florida Community 826,664
AQUA PA MAIN SYSTEM PA1460073 Pennsylvania Community 822,600
VEOLIA WATER NEW JERSEY HACKENSACK NJ0238001 New Jersey Community 792,713
METRO WATER SERVICES TN0000494 Tennessee Community 778,153
MCWA NY2701047 New York Community 768,458
LOUISVILLE WATER COMPANY KY0560258 Kentucky Community 764,769
PHILA SUB WATER CO PA1090076 Pennsylvania Community 759,135