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 |
|---|---|---|---|---|
| Wahpeton City Of | Wahpeton, ND | 7,766 | 9 | Clean |
| Dcwa Central | Petersburg, VA | 7,764 | 9 | Detected |
| Tellico Plains Water Dept | Tellico Plains, TN | 7,759 | 468 | Clean |
| Hampshire | Hampshire, IL | 7,758 | 142 | Clean |
| Mt Horeb Waterworks | Mount Horeb, WI | 7,756 | 182 | Detected |
| City of Crockett | Crockett, TX | 7,755 | 85 | Clean |
| North Hardin WSC | Silsbee, TX | 7,755 | 9 | Clean |
| Valley Psa (Sc0220012) | Gloverville, SC | 7,752 | 21 | Clean |
| Pocahontas Waterworks | Pocahontas, AR | 7,752 | 136 | Clean |
| North Prairie RWD-System 1&2 | Minot, ND | 7,748 | 1 | Detected |
| Sodus-Huron-Wolcott-Butler CSA | Wolcott, NY | 7,746 | 30 | Detected |
| Bloomingdale Water Dept | Bloomingdale Boro, NJ | 7,742 | 58 | Detected |
| Mammoth Mountain Ski Area - Outpost 14 | Mammoth Lakes, CA | 7,736 | 31 | Clean |
| Upper Leacock Township | Leola, PA | 7,734 | 192 | Detected |
| Port Richey Water Dept-City Of | Port Richey, FL | 7,732 | 59 | Detected |
| Rogers Co RWD # 4 | Oologah, OK | 7,725 | 289 | Detected |
| City of Rayne Water System | Rayne, LA | 7,722 | 32 | Clean |
| Ripon Water Utility | Ripon, WI | 7,716 | 11 | Clean |
| Signal Mountain Water System | Signal Mountain, TN | 7,714 | 4 | Detected |
| Lamar Park Water & Sewage Assn | Hattiesburg, MS | 7,714 | 944 | Clean |
| Wichita Valley WSC | Holliday, TX | 7,710 | 21 | Detected |
| Knox County Water and Wastewater PWS | Mount Vernon, OH | 7,710 | 15 | Clean |
| Royalton Townwide Water Dist. | Middleport, NY | 7,710 | 0 | Clean |
| Sun N Lakes of Sebring Water | Sebring, FL | 7,710 | 34 | Clean |
| Autauga Co Water Authority | Prattville, AL | 7,710 | 7 | Clean |
| Hudsonville | Hudsonville, MI | 7,708 | 6 | Clean |
| Western Heights Water Company | Yucaipa, CA | 7,705 | 6 | Clean |
| Telford Borough Authority | Telford, PA | 7,700 | 224 | Detected |
| Washingtonville Village | Washingtonville, NY | 7,700 | 150 | Clean |
| Seward, City Of | Seward, NE | 7,700 | 75 | Clean |
| Buzzards Bay Water District | Bourne, MA | 7,700 | 24 | Clean |
| Andersen Air Force Base Water System | Apo Ap, GU | 7,700 | 10 | Detected |
| Tbcd West Treatment Plant | Stowell, TX | 7,695 | 108 | Detected |
| City of River Oaks | River Oaks, TX | 7,691 | 224 | - |
| Fannin Water Assn-North | Brandon, MS | 7,690 | 1,741 | Clean |
| Woodbine Special Utility District | Gainesville, TX | 7,689 | 12 | Detected |
| Clear Lake Water Department | Clear Lake, IA | 7,687 | 35 | Clean |
| Upper Kula | Wailuku, HI | 7,686 | 256 | Clean |
| Mattapoisett Water Department | Mattapoisett, MA | 7,685 | 20 | Clean |
| Rockton | Rockton, IL | 7,685 | 212 | Detected |
| Harris County MUD 468 | Houston, TX | 7,683 | 4 | Detected |
| Glen Ridge Water Dept | Haskell, NJ | 7,681 | 45 | Detected |
| Earlimart PUD | Earlimart, CA | 7,679 | 35 | Clean |
| Ynp-Old Faithful | Yellowstone, WY | 7,675 | 35 | Clean |
| Central Nash Water & Sewer | Nashville, NC | 7,675 | 65 | Detected |
| Northwest Harris County MUD 10 | Houston, TX | 7,671 | 23 | Clean |
| City of Kennedale | Kennedale, TX | 7,670 | 138 | Clean |
| Fouke WSC | Mineola, TX | 7,668 | 9 | Clean |
| Blackwell Municipal Authority | Blackwell, OK | 7,668 | 250 | Clean |
| Wellington, City Of | Wellington, KS | 7,664 | 152 | Detected |