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 |
|---|---|---|---|---|
| Soquel Creek Water District | Soquel, CA | 40,809 | 4 | Clean |
| Cedar Falls Municipal Water Utilities | Cedar Falls, IA | 40,713 | 25 | Clean |
| Crystal Lake | Crystal Lake, IL | 40,661 | 54 | Detected |
| Lake County East Water Subdistrict | Painesville, OH | 40,656 | 17 | Clean |
| Goose Creek City of (Sc0810004) | Goose Creek, SC | 40,628 | 18 | Detected |
| N Myrtle Beach City of (Sc2610011) | North Myrtle Beach, SC | 40,625 | 26 | Detected |
| Pico Rivera - City, Water Dept. | Pico Rivera, CA | 40,600 | 17 | Detected |
| Athens, the Waterworks Bd of the City Of | Athens, AL | 40,596 | 53 | Clean |
| Northport Water Works (City Of) | Northport, AL | 40,551 | 9 | Clean |
| Smyrna | Smyrna, GA | 40,508 | 7 | Detected |
| Klamath Falls Water Dept | Klamath Falls, OR | 40,475 | 173 | Detected |
| Portsmouth City | Portsmouth, OH | 40,475 | 8 | Detected |
| Lompoc-City Water Utility Div | Lompoc, CA | 40,473 | 8 | Clean |
| Rexburg City Of | Rexburg, ID | 40,462 | 116 | Clean |
| City of Hurst | Hurst, TX | 40,454 | 17 | Detected |
| City of Lancaster | Lancaster, TX | 40,449 | 26 | Detected |
| Spalding County Water System | Griffin, GA | 40,430 | 10 | Detected |
| Hobbs Municipal Water Supply | Hobbs, NM | 40,418 | 17 | Detected |
| San Dieguito WD | Encinitas, CA | 40,405 | 3 | Detected |
| Lancaster City PWS | Lancaster, OH | 40,400 | 9 | Clean |
| Calexico, City Of | Calexico, CA | 40,357 | 17 | Clean |
| Toho Water Authority Western | Kissimmee, FL | 40,330 | 75 | Detected |
| Norwalk First Taxing District | Norwalk, CT | 40,256 | 6 | Detected |
| East Side Consolidated | Belleview, FL | 40,251 | 16 | Detected |
| City of Farmers Branch | Farmers Branch, TX | 40,246 | 22 | Detected |
| Montclair Water Bureau | Haskell, NJ | 40,150 | 56 | Detected |
| Dcwa Knightsville (1820001) | Summerville, SC | 40,141 | 20 | Detected |
| Holyoke Water Works | Holyoke, MA | 40,124 | 76 | Clean |
| Beverly Hills-City, Water Dept. | Beverly Hills, CA | 40,121 | 91 | Clean |
| Shelby County Commission-Water Services | Sterrett, AL | 40,101 | 12 | Detected |
| H.b.& T.s. Utility District | Franklin, TN | 40,094 | 57 | Clean |
| Erie Town Of | Erie, CO | 40,061 | 114 | Clean |
| City of Weslaco | Weslaco, TX | 40,033 | 27 | Detected |
| Surprise City of - Mountain Vista | Surprise, AZ | 40,007 | 419 | Clean |
| Blue Ridge Water Co Inc (Sc2320003) | Greer, SC | 40,006 | 3 | Clean |
| Pleasant Grove City | Orem, UT | 40,000 | 236 | Clean |
| Southwestern PA Water Auth | Jefferson, PA | 40,000 | 84 | Clean |
| Northampton Boro Muni Auth | Northampton, PA | 40,000 | 10 | Clean |
| Warminster Municipal Authority | Warminster, PA | 40,000 | 2,250 | Detected |
| Lake Oswego Municipal Water | Lake Oswego, OR | 40,000 | 39 | Clean |
| University of Missouri Columbia | Columbia, MO | 40,000 | 14 | Clean |
| Hallandale Beach, City Of | Hallandale Beach, FL | 40,000 | 67 | Detected |
| Coral Springs Improvement Dist | Coral Springs, FL | 40,000 | 140 | Clean |
| Newark Water Department | Newark, DE | 40,000 | 42 | Detected |
| Wausau Waterworks | Wausau, WI | 39,994 | 16 | Detected |
| Greenburgh Consolidated WD #1 | Greenburgh, NY | 39,993 | 28 | Clean |
| Cape Girardeau PWS | Cape Girardeau, MO | 39,941 | 71 | Detected |
| Adelanto, City Of | Adelanto, CA | 39,930 | 40 | Detected |
| Oakmont Water Authority | Oakmont, PA | 39,901 | 26 | Clean |
| Sevierville Water System | Sevierville, TN | 39,885 | 55 | Clean |