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 |
|---|---|---|---|---|
| Florida Urbano | Florida, PR | 14,303 | 264 | Clean |
| Roswell | Roswell, GA | 14,300 | 19 | Detected |
| Fraser, City Of | Fraser, MI | 14,297 | 40 | Clean |
| Sequim City Of | Sequim, WA | 14,293 | 12 | Detected |
| City of Dumas | Dumas, TX | 14,290 | 52 | Clean |
| Maumee City | Maumee, OH | 14,286 | 9 | Clean |
| Portales Water System | Portales, NM | 14,284 | 104 | Clean |
| Barkley Lake Water District | Cadiz, KY | 14,284 | 247 | Clean |
| Scottsbluff, City Of | Scottsbluff, NE | 14,282 | 39 | Clean |
| Pala North | Pala, 09 | 14,280 | 43 | Detected |
| Whitefish Bay Waterworks | Milwaukee, WI | 14,272 | 15 | Clean |
| Harris County MUD 285 | Houston, TX | 14,268 | 4 | Detected |
| Huron | Huron, SD | 14,263 | 11 | Clean |
| Butler County Water System Inc | Bowling Green, KY | 14,256 | 295 | Detected |
| Bexley City PWS | Bexley, OH | 14,250 | 15 | Detected |
| Harper Woods | Roseville, MI | 14,236 | 25 | Clean |
| Jacksonville Water Works, Gas and Sewer | Jacksonville, AL | 14,217 | 222 | Clean |
| Niles | Niles, MI | 14,215 | 106 | Clean |
| Liberty Lake Sewer & Water District | Liberty Lake, WA | 14,212 | 27 | Detected |
| Berthoud Town Of | Berthoud, CO | 14,211 | 224 | Clean |
| Kutztown Borough Water | Kutztown, PA | 14,200 | 306 | Clean |
| California City, City Of | California City, CA | 14,198 | 37 | Clean |
| Somerton City Of | Somerton, AZ | 14,197 | 190 | Clean |
| Deep Run Water Corporation | Deep Run, NC | 14,196 | 17 | Detected |
| Fergus Falls | Fergus Falls, MN | 14,194 | 1 | Clean |
| Castalian Springs-Bethpage U.d. | Bethpage, TN | 14,184 | 87 | Clean |
| Antioch | Antioch, IL | 14,175 | 115 | Clean |
| City of Houston Willow Chase | Houston, TX | 14,169 | 8 | Clean |
| McFarland, City Of | McFarland, CA | 14,161 | 157 | Clean |
| Allouez Waterworks | Green Bay, WI | 14,156 | 158 | Clean |
| Harris County MUD 105 | Houston, TX | 14,151 | 80 | Detected |
| Paris Water Works | Paris, KY | 14,139 | 730 | Detected |
| Chicago Ridge | Chicago Ridge, IL | 14,130 | 14 | Clean |
| Girard City | Girard, OH | 14,122 | 23 | Detected |
| City of Andrews | Andrews, TX | 14,109 | 778 | Clean |
| Epcor - Paradise Valley/Scottsdale | El Mirage, AZ | 14,107 | 94 | Clean |
| Washington Court House PWS | Williamsport, OH | 14,100 | 23 | Clean |
| Pierre | Pierre, SD | 14,091 | 9 | Clean |
| Wauconda | Wauconda, IL | 14,084 | 29 | Clean |
| Lancaster City of (Sc2910001) | Lancaster, SC | 14,074 | 67 | Detected |
| Nevada ID - Loma Rica | Grass Valley, CA | 14,072 | 0 | Clean |
| Washington PWS | Washington, MO | 14,068 | 90 | Clean |
| Huntertown Water Works | Fort Wayne, IN | 14,058 | 45 | Clean |
| Worthington | Worthington, MN | 14,052 | 1 | Clean |
| New Ulm | New Ulm, MN | 14,052 | 14 | Clean |
| Butler County Water Authority | Greenville, AL | 14,052 | 89 | Clean |
| Manassas Park, City Of | Manassas Park, VA | 14,051 | 86 | Detected |
| South Sioux City, City Of | South Sioux City, NE | 14,043 | 4 | Clean |
| City of Plaquemine Water System | Plaquemine, LA | 14,043 | 28 | Detected |
| Verona Waterworks | Verona, WI | 14,030 | 28 | Detected |