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 |