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 |
|---|---|---|---|---|
| Sauk Centre | Sauk Centre, MN | 4,573 | 9 | Clean |
| Caledonia Township | Caledonia, MI | 4,573 | 0 | Clean |
| Lancaster Water Works | Lancaster, KY | 4,573 | 332 | Clean |
| Harris County MUD 130 | Houston, TX | 4,572 | 19 | Detected |
| Morningside Heights WD / Erwin (T) | Painted Post, NY | 4,570 | 426 | Detected |
| City of Waynesboro | Waynesboro, MS | 4,570 | 1,121 | Clean |
| Cason Water Association | Nettleton, MS | 4,570 | 523 | Clean |
| Camanche Water Supply | Camanche, IA | 4,570 | 73 | Clean |
| Sand Flat WSC | Tyler, TX | 4,569 | 61 | Clean |
| Cook Springs Water Authority | Pell City, AL | 4,569 | 22 | Detected |
| Negaunee | Negaunee, MI | 4,568 | 26 | Clean |
| Marana Municipal - Airline Lambert | Tucson, AZ | 4,568 | 99 | - |
| Sturbridge Water Department | Sturbridge, MA | 4,567 | 43 | Clean |
| Gardner Community Water System | Boyce, LA | 4,566 | 40 | Clean |
| Richlands, Town Of | Richlands, VA | 4,564 | 51 | Clean |
| Jaguas Pozas | Ciales, PR | 4,563 | 146 | Clean |
| Ciales Urbano | Ciales, PR | 4,563 | 264 | Clean |
| Haina | Hilo, HI | 4,563 | 0 | Clean |
| Mariano Lake-Pinedale-Church Rock NTUA | Ft Defiance, NN | 4,562 | 108 | Clean |
| Evansdale Water Works | Evansdale, IA | 4,561 | 29 | Clean |
| Channel Islands Beach Csd | Oxnard, CA | 4,560 | 0 | Clean |
| Grant Co Psd-Northfork-Maysville | Petersburg, WV | 4,559 | 42 | Clean |
| Town of Mamou Water System | Mamou, LA | 4,559 | 247 | Clean |
| SW Boone County Water Assoc | Harrison, AR | 4,558 | 5 | Clean |
| Chelford One MUD | Houston, TX | 4,557 | 7 | Clean |
| Louisburg, Town Of | Louisburg, NC | 4,554 | 160 | - |
| Watertown | Watertown, MN | 4,550 | 25 | Clean |
| City of Howe | TX | 4,548 | 111 | - |
| Colyell Community Water | Livingston, LA | 4,544 | 57 | - |
| Prices Fork/Merrimac | Christiansburg, VA | 4,541 | 9 | Clean |
| Holiday Island Waterworks | Holiday Island, AR | 4,540 | 57 | Clean |
| Providence Water Works | Providence, KY | 4,538 | 457 | Detected |
| East Dublin | East Dublin, GA | 4,536 | 33 | Clean |
| Saluda Co W&S Authority (4120001) | Ridge Spring, SC | 4,535 | 172 | Detected |
| West Wendover Water System | West Wendover, NV | 4,535 | 42 | Clean |
| Oro Valley Water Countryside | Oro Valley, AZ | 4,534 | 143 | Clean |
| City of Ovilla | Ovilla, TX | 4,532 | 87 | Detected |
| Crystal River, City Of | Crystal River, FL | 4,528 | 53 | Clean |
| Sunbelt Fwsd Woodland Oaks Subdivision | Houston, TX | 4,527 | 25 | Detected |
| Unicoi Utility District | Unicoi, TN | 4,527 | 27 | Clean |
| Mount Vernon Water Supply | Mount Vernon, IA | 4,527 | 37 | Clean |
| Cal Am - Bass Lake | Sacramento, CA | 4,527 | 8 | Detected |
| University Estates Water System (Lcu) | Las Cruces, NM | 4,526 | 66 | Clean |
| Lawrenceville | Lawrenceville, IL | 4,524 | 73 | Clean |
| Town of Clayton - North | Clayton, NC | 4,523 | 5 | - |
| Elizabeth Town Of | Elizabeth, CO | 4,523 | 191 | - |
| Morgan City Water System | Morgan, UT | 4,520 | 244 | Clean |
| Montgomery Village | Montgomery, NY | 4,519 | 0 | Detected |
| Coopersville | Coopersville, MI | 4,519 | 14 | Clean |
| Harris County MUD 344 | Houston, TX | 4,518 | 2 | - |