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 |
|---|---|---|---|---|
| Lares Espino | Santurce, PR | 16,676 | 200 | Detected |
| Douglas City Of | Douglas, AZ | 16,656 | 929 | Clean |
| Rincon Water System | Rincon, GA | 16,654 | 41 | Clean |
| Harriman Utility Board | Harriman, TN | 16,653 | 41 | Clean |
| Russellville Water Works | Russellville, AL | 16,650 | 9 | Clean |
| MO American Platte County | Parkville, MO | 16,645 | 4 | Clean |
| Yelm City Of | Yelm, WA | 16,633 | 9 | Clean |
| Douglas Water Authority | Douglas, AL | 16,632 | 186 | Clean |
| Sonterra MUD | Austin, TX | 16,614 | 23 | Detected |
| Ukiah, City Of | Ukiah, CA | 16,607 | 4 | Detected |
| PA American Water Co Clarion | New Castle, PA | 16,600 | 9 | Clean |
| Fulton City | Fulton, NY | 16,600 | 13 | Clean |
| Phoenixville Water Dept | Phoenixville, PA | 16,599 | 502 | Detected |
| Naval Air Station/Whidbey Island | NAS Whidbey Island, WA | 16,595 | 10 | Clean |
| Olivehurst Public U.d. | Olivehurst, CA | 16,595 | 28 | Clean |
| Grand Canyon National Park | Grand Canyon, AZ | 16,590 | 424 | Clean |
| Johnson City Water Works | Johnson City, NY | 16,578 | 114 | Detected |
| Waterford Wpca | Waterford, CT | 16,578 | 104 | Clean |
| Pineville Water System | Pineville, KY | 16,573 | 734 | Clean |
| Wright-Patterson Afb Area a PWS | Vandalia, OH | 16,551 | 32 | Detected |
| Jefferson County PWSD 2 | Eureka, MO | 16,548 | 78 | Clean |
| Cole County PWSD 1 | Jefferson City, MO | 16,548 | 6 | Detected |
| Harris County MUD 26 | Houston, TX | 16,518 | 3 | Clean |
| Newton Water Supply | Newton, IA | 16,518 | 34 | Clean |
| Notla Water Authority | Blairsville, GA | 16,518 | 112 | Clean |
| Ohio County Water District | Hartford, KY | 16,511 | 411 | Clean |
| City of Highland Village | Highland Village, TX | 16,500 | 25 | Detected |
| Country Club Hills | Country Club Hills, IL | 16,500 | 24 | Clean |
| Defiance City | Defiance, OH | 16,494 | 386 | Detected |
| Frenchtown Township | Monroe, MI | 16,481 | 168 | Detected |
| Opa Locka, City Of | Opalocka, FL | 16,479 | 67 | Detected |
| Ramsey Water Company, Inc. | Ramsey, IN | 16,475 | 29 | Detected |
| Safety Harbor Water Dept | Safety Harbor, FL | 16,473 | 26 | Detected |
| Bridgeview | Bridgeview, IL | 16,467 | 21 | Clean |
| Park Ridge Water Dept | Park Ridge, NJ | 16,466 | 512 | Detected |
| Red Wing | Red Wing, MN | 16,459 | 45 | Clean |
| City of Groves | Groves, TX | 16,452 | 27 | Clean |
| North Peninsula | Poulsbo, WA | 16,449 | 31 | Clean |
| El Segundo-City, Water Dept. | El Segundo, CA | 16,445 | 4 | Clean |
| Jackson County PWSD 2 | Raytown, MO | 16,440 | 19 | Clean |
| Chatham | Chatham, IL | 16,423 | 39 | Clean |
| Frankfort Water Works | Frankfort, IN | 16,422 | 193 | Clean |
| Barbourville Utilities | Barbourville, KY | 16,420 | 347 | Detected |
| Fillmore Water Dept | Fillmore, CA | 16,419 | 13 | Clean |
| Olympic View Water & Sewer District | Edmonds, WA | 16,403 | 14 | Clean |
| City of Royse City | Royse City, TX | 16,400 | 55 | Detected |
| Hazel Park | Hazel Park, MI | 16,400 | 0 | Clean |
| Allen County Water District | Scottsville, KY | 16,398 | 37 | Clean |
| Harris County MUD 55 Heritage Park | Houston, TX | 16,392 | 20 | Detected |
| City of Cleveland | Cleveland, MS | 16,392 | 389 | Clean |