Public Water Systems
143,076 active public water systems, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Lake Utility Services Inc North (8 Wps) | Altamonte Springs, FL | 24,798 | 101 | Detected |
| Cal-Am Water Company - Duarte | Rosemead, CA | 24,773 | 0 | Detected |
| City of Boerne | Boerne, TX | 24,769 | 19 | Detected |
| Iowa-American Wtr Co-Clinton District | Clinton, IA | 24,769 | 5 | Detected |
| Nawa | Tipp City, OH | 24,766 | 11 | Clean |
| Jackson, Town Of | Jackson, WY | 24,760 | 283 | Detected |
| East Rio Hondo WSC | Rio Hondo, TX | 24,756 | 14 | Detected |
| North Canton City PWS | N Canton, OH | 24,747 | 47 | Clean |
| Johnstown Town Of | Johnstown, CO | 24,725 | 294 | Clean |
| Liberty Utilities - Lynwood | Downey, CA | 24,701 | 0 | Detected |
| Rockville Centre (V) | Rockville Centre, NY | 24,700 | 131 | Clean |
| Boone County Cons PWSD 1 | Columbia, MO | 24,700 | 22 | Clean |
| Vera Water & Power | Spokane Valley, WA | 24,692 | 66 | Clean |
| Vilonia Waterworks | Vilonia, AR | 24,690 | 26 | Clean |
| Tinker Air Force Base | Oklahoma City, OK | 24,645 | 47 | Detected |
| Dartmouth Water Division | Dartmouth, MA | 24,630 | 38 | Detected |
| Calico Ghost Town | San Bernardino, CA | 24,623 | 131 | - |
| Culleoka WSC | Princeton, TX | 24,615 | 17 | Detected |
| Herndon, Town Of | Herndon, VA | 24,601 | 6 | Detected |
| Lewisburg Water System | Lewisburg, TN | 24,569 | 21 | Detected |
| IL American-Homer Township | Godfrey, IL | 24,543 | 2 | Clean |
| Nixa PWS | Nixa, MO | 24,532 | 84 | Clean |
| Bridgestone MUD | Houston, TX | 24,528 | 13 | Detected |
| La Cocina | Aguanga, CA | 24,524 | 12 | - |
| Timber Lane Utility District | Houston, TX | 24,507 | 7 | Clean |
| Fitchburg Utility Dist 1 | Fitchburg, WI | 24,500 | 53 | Clean |
| Ephrata Area Joint Authority | Ephrata, PA | 24,500 | 182 | Detected |
| Collingswood Water Depar | Pennsauken, NJ | 24,500 | 330 | Clean |
| Jackson County PWSD 1 | Grandview, MO | 24,500 | 2 | Clean |
| Pittsfield Township | Ann Arbor, MI | 24,500 | 21 | Clean |
| Sulphur City of Water System | Sulphur, LA | 24,489 | 71 | Clean |
| Maury Co Water System | Columbia, TN | 24,488 | 53 | Detected |
| Lumberton, City Of | Lumberton, NC | 24,460 | 29 | Detected |
| San Sebastian | San Sebastian, PR | 24,449 | 250 | Clean |
| Zion | Zion, IL | 24,442 | 21 | Clean |
| Benbrook Water Authority | Benbrook, TX | 24,437 | 39 | Detected |
| West Memphis Waterworks | West Memphis, AR | 24,419 | 63 | Clean |
| West Cedar Creek MUD | Tool, TX | 24,414 | 89 | Detected |
| North Perry Ave Water District | Bremerton, WA | 24,402 | 47 | Clean |
| Falls Twp Water & Sewer Dept | Fairless Hills, PA | 24,400 | 144 | Detected |
| Montgomery County MUD 46 | The Woodlands, TX | 24,399 | 20 | Clean |
| Wadsworth City PWS | Wadsworth, OH | 24,356 | 8 | Clean |
| Paintsville Municipal Water Works | Paintsville, KY | 24,354 | 581 | Clean |
| City of Ridgeland | Ridgeland, MS | 24,340 | 716 | Clean |
| Jea: Lofton Oaks Grid | Jacksonville, FL | 24,318 | 8 | Clean |
| Harrison Township | Harrison Township, MI | 24,314 | 6 | Clean |
| Gaffney Bpw (1110001) | Gaffney, SC | 24,290 | 39 | Detected |
| Phelan Pinon Hills Csd | Phelan, CA | 24,285 | 3 | Clean |
| Lexington Town of (3210001) | Lexington, SC | 24,284 | 79 | Detected |
| South Sumter Utilities | The Villages, FL | 24,278 | 0 | Clean |