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 |
|---|---|---|---|---|
| Kern Valley State Prison | Delano, CA | 5,000 | 50 | Clean |
| Wooster Waterworks | Wooster, AR | 5,000 | 55 | Clean |
| Chukchansi Gold Resort | Coarsegold, 09 | 5,000 | 9 | Detected |
| Ste Genevieve PWS | Ste Genevieve, MO | 4,999 | 48 | Clean |
| Cattaraugus Cws | Salamanca, 02 | 4,999 | 67 | Clean |
| Craigsville Psd | Craigsville, WV | 4,997 | 53 | Clean |
| Gibraltar | Gibraltar, MI | 4,997 | 22 | Clean |
| Bogue Banks Water Corporation | Emerald Isle, NC | 4,995 | 172 | Clean |
| Louisburg, City Of | Louisburg, KS | 4,994 | 263 | Detected |
| Paint Brush Hills | Falcon, CO | 4,994 | 1,810 | Clean |
| Seminole Improvement District | Westlake, FL | 4,993 | 370 | Detected |
| Danville Municipal Water Auth | Danville, PA | 4,992 | 282 | Detected |
| Kolin Ruby Wise Waterwork District 11 A | Pineville, LA | 4,992 | 9 | Clean |
| Chagrin Falls Village PWS | Chagrin Falls, OH | 4,991 | 53 | Clean |
| Hamburg Muni Water&sewer Auth | Hamburg, PA | 4,990 | 295 | Clean |
| Ricewood MUD | Houston, TX | 4,989 | 8 | Clean |
| Dilkon-Indian Wells-Greasewood-White Cone NTUA | Fort Defiance, NN | 4,986 | 223 | Clean |
| Washington Twp Mua-Schoo | Long Valley, NJ | 4,986 | 196 | Detected |
| Kanab City | Kanab, UT | 4,985 | 146 | Clean |
| Clayton Village W/a #1-East | Starkville, MS | 4,984 | 700 | Clean |
| Montoursville Water Company | Montoursville, PA | 4,983 | 141 | Detected |
| Medical Lake City Of | Medical Lake, WA | 4,982 | 11 | Detected |
| Montgomery County Ud 4 | Houston, TX | 4,980 | 7 | Clean |
| Xenia RWD (Boone) | Bouton, IA | 4,975 | 81 | Clean |
| City of la Grange | La Grange, TX | 4,973 | 150 | Detected |
| Follansbee Hooverson Heights | Follansbee, WV | 4,970 | 263 | Detected |
| City of Biloxi-French | Biloxi, MS | 4,968 | 365 | Clean |
| Clinton Co PWSD 4 Sys 1 | Lathrop, MO | 4,968 | 33 | Clean |
| Persia Utility District | Rogersville, TN | 4,966 | 134 | Detected |
| Tomlinson Psd-Newell | Chester, WV | 4,963 | 220 | - |
| Boone County PWSD 10 | Centralia, MO | 4,963 | 28 | Clean |
| Murdale Pwd | Murphysboro, IL | 4,963 | 17 | Clean |
| Shinnston City Of | Shinnston, WV | 4,959 | 325 | Clean |
| City of Hearne | Hearne, TX | 4,959 | 68 | Clean |
| Colville Water Department | Colville, WA | 4,955 | 6 | Clean |
| Western Region Allegany Distrib. System | Cumberland, MD | 4,955 | 10 | Clean |
| Town of Manchester | Manchester, MD | 4,954 | 140 | Detected |
| Dog Ridge WSC | Belton, TX | 4,953 | 53 | Clean |
| Mt Vernon Water Works | Brodhead, KY | 4,951 | 134 | Clean |
| Shawano Lk San Dist 1 | Shawano, WI | 4,950 | 19 | Detected |
| Evergreen Water Works | Evergreen, AL | 4,950 | 16 | Clean |
| Grambling Water System | Grambling, LA | 4,949 | 129 | Clean |
| City of Grass Valley | Grass Valley, CA | 4,947 | 4 | Clean |
| Luverne | Luverne, MN | 4,946 | 20 | Clean |
| Conroe Isd Moorehead JR High School | Conroe, TX | 4,945 | 44 | Clean |
| Milan | Milan, IL | 4,945 | 161 | Clean |
| Frankenmuth, City Of | Frankenmuth, MI | 4,944 | 0 | Clean |
| City of Taft | Taft, TX | 4,941 | 61 | Detected |
| North Green MUD | Houston, TX | 4,941 | 15 | Clean |
| Georgetown Rural Comm WA (2220001) | Georgetown, SC | 4,941 | 4 | Clean |