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 |
|---|---|---|---|---|
| City of Alhambra | Alhambra, CA | 79,776 | 8 | Clean |
| Florence City of (Sc2110001) | Florence, SC | 79,745 | 40 | Detected |
| City of Pharr | Pharr, TX | 79,715 | 8 | Detected |
| Sanford, City of (2 Wps) | Sanford, FL | 79,715 | 107 | Detected |
| Sunrise Springtree | Sunrise, FL | 79,550 | 54 | Detected |
| City of Lake Charles Water System | Lake Charles, LA | 79,500 | 15 | Clean |
| Edmond PWA | Edmond, OK | 79,408 | 153 | Detected |
| Sammamish Plateau Water & Sewer | Sammamish, WA | 79,362 | 77 | Detected |
| Hendersonville, City Of | Hendersonville, NC | 79,278 | 272 | Clean |
| Lancaster County W&SD (Sc2920001) | Lancaster, SC | 79,107 | 56 | Detected |
| City of Bossier City Water System | Bossier City, LA | 78,960 | 15 | Clean |
| Hammond Water Works Department | Hammond, IN | 78,384 | 38 | Clean |
| Lake County West Water Subdistrict | Painesville, OH | 78,379 | 6 | Clean |
| Upland, City Of | Upland, CA | 78,376 | 10 | Detected |
| Golden Heart Utilities | Fairbanks, AK | 78,324 | 122 | Detected |
| Warren County | Lebanon, OH | 78,299 | 153 | Clean |
| Redlands City MUD-Water Div | Redlands, CA | 78,025 | 11 | Detected |
| West Knox Utility District | Knoxville, TN | 77,825 | 13 | Clean |
| Florence, Water Department, City Of | Florence, AL | 77,766 | 12 | Detected |
| Bend, City Of | Bend, OR | 77,704 | 339 | Detected |
| Bloomington | Bloomington, IL | 77,610 | 61 | Detected |
| Acsa Urban Area | Charlottesville, VA | 77,408 | 3 | Clean |
| Franklin Water Dept | Franklin, TN | 77,222 | 291 | Detected |
| City of Mansfield | Mansfield, TX | 77,142 | 27 | Detected |
| Decatur, Municipal Utilities Board Of | Decatur, AL | 77,103 | 7 | Detected |
| City of Mission | Mission, TX | 77,058 | 132 | Detected |
| Flagstaff City Of | Flagstaff, AZ | 76,960 | 1,061 | Detected |
| City of Pleasanton | Pleasanton, CA | 76,689 | 4 | Detected |
| Dulles Airport | Dulles, VA | 76,500 | 34 | Detected |
| South Gate-City, Water Dept. | South Gate, CA | 76,443 | 127 | Detected |
| Chino Hills, City Of | Chino Hills, CA | 76,414 | 43 | Clean |
| Hardin County Water District #2 | Elizabethtown, KY | 76,326 | 26 | Detected |
| Ankeny, City Of | Ankeny, IA | 76,207 | 386 | Clean |
| Decatur | Decatur, IL | 76,122 | 99 | Clean |
| Bonita Springs Utilities | Bonita Springs, FL | 76,033 | 13 | Clean |
| Parker WSD | Parker, CO | 75,949 | 466 | Detected |
| Schaumburg | Schaumburg, IL | 75,750 | 22 | Clean |
| Hickory City Of | Hickory, NC | 75,654 | 9 | Clean |
| Snow Summit | Big Bear Lake, CA | 75,500 | 45 | - |
| Hot Springs Utilities | Hot Springs, AR | 75,343 | 83 | Clean |
| Bcwws 1A | Pompano Beach, FL | 75,305 | 47 | Detected |
| City of Gulfport | Gulfport, MS | 75,056 | 1,598 | Clean |
| East Orange Water Commission | East Orange, NJ | 75,000 | 316 | Detected |
| Maple Grove | Maple Grove, MN | 75,000 | 1 | Detected |
| New Design - Frederick County | Frederick, MD | 74,911 | 28 | Detected |
| Compton-City, Water Dept. | Compton, CA | 74,877 | 20 | Detected |
| Desert Water Agency | Palm Springs, CA | 74,807 | 22 | Clean |
| Appleton Waterworks | Appleton, WI | 74,511 | 51 | Detected |
| Wailuku | Wailuku, HI | 74,511 | 59 | Clean |
| Aqua Ohio - Mentor | Mentor, OH | 74,500 | 10 | Clean |