Browse Water Systems
433,347 public water systems.
Public Water Systems Database
Browse 433,347 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 | CA | Transient Non-Community | 9,000,000 |
| NEW YORK CITY SYSTEM | NY7003493 | NY | Community | 8,271,000 |
| ROY'S BLOOMINGDALE TAVERN | IL0041483 | IL | Transient Non-Community | 6,010,890 |
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | CA1910067 | CA | Community | 3,875,566 |
| CITY OF HOUSTON | TX1010013 | TX | Community | 2,970,543 |
| CHICAGO | IL0316000 | IL | Community | 2,746,388 |
| MWRA | MA6000000 | MA | Community | 2,660,000 |
| MDWASA - MAIN SYSTEM | FL4130871 | FL | Community | 2,377,460 |
| SAN ANTONIO WATER SYSTEM | TX0150018 | TX | Community | 2,113,151 |
| NEW YORK STATE FAIR | NY3330032 | NY | Transient Non-Community | 2,000,000 |
| PHILADELPHIA WATER DEPARTMENT | PA1510004 | PA | Community | 1,950,098 |
| WASHINGTON SUBURBAN SANITARY COMMISSION | MD0150005 | MD | Community | 1,900,000 |
| BALTIMORE CITY-BUREAU WATER SU | MD0002208 | MD | Community | 1,755,000 |
| PHOENIX CITY OF | AZ0407025 | AZ | Community | 1,695,000 |
| PHILADELPHIA WATER DEPARTMENT | PA1510001 | PA | Community | 1,600,000 |
| CITY OF BALTIMORE | MD0300002 | MD | Community | 1,600,000 |
| LAS VEGAS VALLEY WATER DISTRICT | NV0000090 | NV | Community | 1,539,277 |
| EAST BAY MUD | CA0110005 | CA | Community | 1,442,800 |
| SAN DIEGO, CITY OF | CA3710020 | CA | Community | 1,385,379 |
| DALLAS WATER UTILITY | TX0570004 | TX | Community | 1,356,479 |
| CLEVELAND PUBLIC WATER SYSTEM | OH1801212 | OH | Community | 1,308,955 |
| COLUMBUS PUBLIC WATER SYSTEM | OH2504412 | OH | Community | 1,305,946 |
| WASHINGTON SUBURBAN SANITARY C | MD0002489 | MD | Community | 1,300,000 |
| PATUXEUNT PLANT WSSC | MD0000030 | MD | Community | 1,300,000 |
| POTOMAC PLANT WSSC | MD0000027 | MD | Community | 1,300,000 |
| DENVER WATER BOARD | CO0116001 | CO | Community | 1,287,000 |
| CHARLOTTE WATER | NC0160010 | NC | Community | 1,163,701 |
| FAIRFAX COUNTY WATER AUTHORITY | VA6059501 | VA | Community | 1,121,613 |
| CITY OF AUSTIN WATER & WASTEWATER | TX2270001 | TX | Community | 1,115,323 |
| MO AMERICAN ST LOUIS ST CHARLES COUNTIES | MO6010716 | MO | Community | 1,111,000 |
| SUFFOLK COUNTY WATER AUTHORITY | NY5110526 | NY | Community | 1,100,000 |
| SEATTLE PUBLIC UTILITIES | WA5377050 | WA | Community | 1,091,904 |
| ATLANTA | GA1210001 | GA | Community | 1,089,893 |
| METROPOLITANO | PR0002591 | PR | Community | 1,077,332 |
| SAN JOSE WATER | CA4310011 | CA | Community | 1,039,920 |
| NEW YORK CITY - CROTON SYSTEM | NY7003666 | NY | Community | 1,000,000 |
| GWINNETT CO. DEPT. OF WATER RESOURCES | GA1350004 | GA | Community | 975,000 |
| CITY OF FORT WORTH | TX2200012 | TX | Community | 955,900 |
| OVALTINE PRODUCTS | IL0039214 | IL | Transient Non-Community | 900,500 |
| PHILADELPHIA SUBURBAN WATER CO | PA1460021 | PA | Community | 900,000 |
| CITIZENS WATER - INDIANAPOLIS | IN5249004 | IN | Community | 880,345 |
| SFPUC CITY DISTRIBUTION DIVISION | CA3810011 | CA | Community | 848,019 |
| JEA MAJOR GRID | FL2161328 | FL | Community | 826,664 |
| AQUA PA MAIN SYSTEM | PA1460073 | PA | Community | 822,600 |
| VEOLIA WATER NEW JERSEY HACKENSACK | NJ0238001 | NJ | Community | 792,713 |
| METRO WATER SERVICES | TN0000494 | TN | Community | 778,153 |
| LOUISVILLE WATER COMPANY | KY0560258 | KY | Community | 764,769 |
| PHILA SUB WATER CO | PA1090076 | PA | Community | 759,135 |
| CINCINNATI PUBLIC WATER SYSTEM | OH3102612 | OH | Community | 750,200 |