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 |
|---|---|---|---|---|
| Ralls County PWSD 1 | Hannibal, MO | 7,662 | 46 | Detected |
| Central Weld Cnty WD | Greeley, CO | 7,662 | 8 | Clean |
| Minor Hill Water U.d. | Minor Hill, TN | 7,661 | 131 | Detected |
| Wernersville Muni Water Auth | Wernersville, PA | 7,654 | 113 | Detected |
| Williamston, Town Of | Williamston, NC | 7,650 | 6 | Detected |
| Old Town Water District | Old Town, ME | 7,648 | 12 | Clean |
| Southwick Water Dept | Southwick, MA | 7,646 | 140 | Clean |
| South Fork Utility District | Bristol, TN | 7,645 | 124 | Clean |
| Jayuya Urbano | Jayuya, PR | 7,644 | 302 | Detected |
| Lebanon Water Works Co Inc | Lebanon, KY | 7,642 | 99 | Clean |
| Fortville Water Works | Fortville, IN | 7,638 | 23 | Clean |
| Dekalb County PWSD 1 | Clarksdale, MO | 7,635 | 7 | Clean |
| Butler Water Dept | Butler, NJ | 7,630 | 379 | Detected |
| Hollywood Gaming @ Mvrc | Wyomissing, OH | 7,625 | 2 | Clean |
| Baton Water Corporation | Granite Falls, NC | 7,620 | 3 | Clean |
| Vandalia | Vandalia, IL | 7,616 | 62 | Clean |
| Lander, City Of | Lander, WY | 7,615 | 68 | Clean |
| Lower Valley Water Users Association | Kirtland, NM | 7,615 | 69 | Clean |
| Decorah Water Department | Decorah, IA | 7,615 | 17 | Detected |
| Kimberly Waterworks | Kimberly, WI | 7,608 | 44 | Clean |
| Montgomery County MUD 18 | Spring, TX | 7,608 | 17 | Detected |
| North Desoto Water System | Stonewall, LA | 7,608 | 36 | Clean |
| Herkimer Village | Herkimer, NY | 7,606 | 604 | Clean |
| City of Richwood | Richwood, TX | 7,605 | 47 | Detected |
| Ledgeview TN Sanitary Dist 2 | DE Pere, WI | 7,602 | 160 | Clean |
| Norfolk Water Division | Norfolk, MA | 7,602 | 327 | Detected |
| Oceano Comm Services Dist. | Oceano, CA | 7,601 | 23 | Clean |
| Hartford Water Dept | White River Jct, VT | 7,600 | 10 | Clean |
| Hdma - Benton RD PWS | Marysville, OH | 7,600 | 63 | Clean |
| Pine Bush Water District | Pine Bush, NY | 7,600 | 126 | Clean |
| Ingalls Water Company | Ingalls, IN | 7,600 | 309 | Clean |
| Vail Assoc Midvail Eagle | Vail, CO | 7,600 | 86 | Clean |
| Cy Champ PUD | Houston, TX | 7,596 | 6 | Detected |
| Emporia, City Of | Emporia, VA | 7,594 | 190 | Clean |
| City of Marksville Water System | Marksville, LA | 7,593 | 36 | Clean |
| Okaloosa County Mid System (Crestview) | Ft. Walton Beach, FL | 7,593 | 23 | Clean |
| Pike County PWSD 1 | Bowling Green, MO | 7,590 | 10 | Detected |
| Zephyr WSC | Zephyr, TX | 7,575 | 60 | Detected |
| City of St Martinville Water System | St. Martinville, LA | 7,575 | 121 | Clean |
| Roanoke, the Util. Bd. of the City Of | Roanoke, AL | 7,575 | 31 | Clean |
| Marengo | Marengo, IL | 7,572 | 14 | Detected |
| Wauseon City | Wauseon, OH | 7,568 | 111 | Detected |
| Cole County PWSD 4 | Jefferson City, MO | 7,568 | 81 | Clean |
| Crete, City Of | Crete, NE | 7,566 | 20 | Clean |
| Southeast Polk RWD | Des Moines, IA | 7,565 | 102 | Clean |
| Veolia Water PA Dallas | Harrisburg, PA | 7,563 | 267 | Detected |
| Cohasset Water Dept | Cohasset, MA | 7,555 | 64 | Detected |
| Halifax Water Department | Halifax, MA | 7,553 | 53 | Detected |
| Kensington Fire District | Kensington, CT | 7,553 | 96 | Clean |
| Gaston Rural Water Dist (Sc3220002) | Gaston, SC | 7,550 | 24 | Clean |