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 |
|---|---|---|---|---|
| Napa, City Of | Napa, CA | 84,804 | 23 | Clean |
| Indio Water Authority | Indio, CA | 84,757 | 14 | Clean |
| Columbia Power and Water Systems | Columbia, TN | 84,617 | 5 | Detected |
| Goleta Water District | Goleta, CA | 84,462 | 22 | Detected |
| Hallsdale-Powell U.d. | Knoxville, TN | 84,315 | 68 | Clean |
| Waldorf - Charles County Dpw | La Plata, MD | 84,296 | 19 | Detected |
| Yorba Linda Water District | Placentia, CA | 84,292 | 4 | Detected |
| Westland | Westland, MI | 84,094 | 17 | Clean |
| Gw Santa Cruz Water Co | Maricopa, AZ | 84,000 | 256 | Clean |
| Warner Robins | Warner Robins, GA | 83,705 | 43 | Clean |
| City of Longview | Longview, TX | 83,236 | 1 | Clean |
| Montgomery County Water Services 2 PWS | Kettering, OH | 83,033 | 32 | Detected |
| Avondale City Of | Avondale, AZ | 83,001 | 242 | Detected |
| City of Bloomington Utilities | Bloomington, IN | 83,000 | 48 | Clean |
| Cicero | Cicero, IL | 83,000 | 43 | Clean |
| Winter Park, City of (3 Wps) | Winter Park, FL | 82,984 | 67 | Clean |
| Rock Hill City of (Sc4610002) | Rock Hill, SC | 82,846 | 29 | Detected |
| St. Cloud, City of (3 Wps) | St. Cloud, FL | 82,752 | 159 | Clean |
| Woodbury | Woodbury, MN | 82,643 | 17 | Detected |
| Apex, Town Of | Apex, NC | 82,029 | 69 | Detected |
| Layton City Water System | Layton, UT | 82,000 | 89 | Clean |
| Naples Water Dept | Naples, FL | 82,000 | 46 | Detected |
| City of Buena Park | Buena Park, CA | 81,998 | 12 | Detected |
| City of Milpitas | Milpitas, CA | 81,773 | 15 | Clean |
| South Huntington Water District | Centerport, NY | 81,760 | 11 | Clean |
| Summerville Cpw (Sc1810003) | Summerville, SC | 81,750 | 13 | Detected |
| Lafourche Water District 1 | Lockport, LA | 81,609 | 11 | Detected |
| City of Mountain View | Mountain View, CA | 81,501 | 17 | Clean |
| Rogers Water Utilities | Rogers, AR | 81,443 | 1 | Clean |
| Rehoboth Pump District (Tui) | Dover, DE | 81,417 | 9 | Detected |
| Consolidated Mutual Maple Grove | Lakewood, CO | 81,400 | 18 | Detected |
| Flint, City Of | Flint, MI | 81,252 | 48 | Clean |
| Madison Suburban U.d. | Madison, TN | 81,203 | 23 | Clean |
| Big Bear Administration | San Bernardino, CA | 81,075 | 12 | - |
| Somerville Water Dept. (Mwra) | Somerville, MA | 81,045 | 33 | Clean |
| Plymouth | Plymouth, MN | 81,026 | 3 | Detected |
| Deltona Water | Deltona, FL | 81,006 | 92 | Detected |
| Lynchburg, City Of | Lynchburg, VA | 80,995 | 0 | Clean |
| Folsom, City of - Main | Folsom, CA | 80,969 | 8 | Clean |
| Inglewood- City, Water Dept. | Inglewood, CA | 80,824 | 16 | Detected |
| Rio Blanco,vieques,culedra | Naguabo, PR | 80,759 | 647 | Clean |
| Ocud/Southern Water Sys (5 Wps) | Orlando, FL | 80,738 | 27 | Clean |
| Okaloosa Co.wtr.; Swr.system | Fort Walton Beach, FL | 80,295 | 29 | Clean |
| Ecwa Amherst | Buffalo, NY | 80,228 | 0 | - |
| City of Houston Ud 5 - Kingwood | Houston, TX | 80,073 | 23 | Clean |
| Town of Flower Mound | Flower Mound, TX | 80,000 | 34 | Detected |
| Aqua Illinois-Kankakee | Kankakee, IL | 80,000 | 21 | Clean |
| Homestead, City Of | Homestead, FL | 80,000 | 54 | Detected |
| Lehi City | Lehi, UT | 79,978 | 198 | Clean |
| Jonesboro Water System | Jonesboro, AR | 79,889 | 11 | Clean |