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 |
|---|---|---|---|---|
| Ephrata Water Department | Ephrata, WA | 8,620 | 267 | Clean |
| Rock Falls | Rock Falls, IL | 8,620 | 142 | Detected |
| Corozal Urbano | Corozal, PR | 8,619 | 446 | Detected |
| US Air Force Base Little Rock | Jacksonville, AR | 8,618 | 9 | Clean |
| Millington Water Dept | Millington, TN | 8,615 | 33 | Clean |
| Russellville Mun Water Works | Russellville, KY | 8,613 | 201 | Detected |
| East Washington Rural Water | Salem, IN | 8,613 | 146 | Clean |
| Montgomery County MUD 6 | The Woodlands, TX | 8,610 | 11 | Clean |
| Portage County Water Resources | Ravenna, OH | 8,606 | 10 | Clean |
| Tallulah Water System | Tallulah, LA | 8,601 | 231 | Clean |
| South Bullock County Water Authority | Montgomery, AL | 8,601 | 20 | Clean |
| General Authority of Franklin | Franklin, PA | 8,600 | 61 | Detected |
| Greenville Muni Water Auth | Greenville, PA | 8,600 | 438 | Clean |
| Oberlin Water Department | Lagrange, OH | 8,600 | 32 | Detected |
| Town of North East | North East, MD | 8,600 | 168 | Detected |
| University of Idaho | Moscow, ID | 8,589 | 6 | Clean |
| Park Hills PWS | Park Hills, MO | 8,587 | 121 | Clean |
| Elwood Water & Sewage | Elwood, IN | 8,586 | 28 | Clean |
| Forsyth | Forsyth, GA | 8,585 | 63 | Detected |
| Menominee | Menominee, MI | 8,583 | 27 | Clean |
| Hood River, City Of | Hood River, OR | 8,577 | 101 | Clean |
| Sanitary District #4 | Columbus, OH | 8,575 | 40 | Detected |
| Lynnfield Center Water District | Lynnfield, MA | 8,569 | 154 | Detected |
| Millsboro Water Department | Millsboro, DE | 8,568 | 25 | Clean |
| Warwick Twp Lititz Sys | Lititz, PA | 8,561 | 130 | Detected |
| Holly, Village Of | Holly, MI | 8,557 | 26 | Clean |
| Perryville PWS | Perryville, MO | 8,555 | 74 | Clean |
| Merck and Co Inc | West Point, PA | 8,550 | 70 | Detected |
| Laclede County PWSD 1 | Lebanon, MO | 8,550 | 58 | Clean |
| Steilacoom Town Of | Steilacoom, WA | 8,545 | 2 | Clean |
| Cape Perry County PWSD 1 South | Jackson, MO | 8,545 | 82 | Clean |
| Southwest Water Authority | Dickinson, ND | 8,537 | 2 | Clean |
| Westwego Waterworks | Westwego, LA | 8,534 | 159 | Clean |
| Wilbraham Water Dept (Mwra) | Wilbraham, MA | 8,533 | 23 | Clean |
| McWa - Geneva | Rochester, NY | 8,532 | 8 | - |
| Lyndon B Johnson Space Center | Houston, TX | 8,530 | 10 | Detected |
| Liberty Utilities Aurora Verona | Aurora, MO | 8,529 | 15 | Clean |
| Cedarville Waterworks Fbcc | Cedarville, AR | 8,529 | 0 | Clean |
| County Wide Utility District | Alamo, TN | 8,528 | 51 | Detected |
| Harrisburg | Harrisburg, IL | 8,524 | 39 | Clean |
| Hollidaysburg Muni Auth | Hollidaysburg, PA | 8,523 | 61 | Clean |
| Salisbury Twp Water System | Allentown, PA | 8,522 | 13 | Detected |
| Tecumseh | Tecumseh, MI | 8,521 | 0 | Clean |
| Siler City, Town Of | Siler City, NC | 8,520 | 249 | Detected |
| Winnemucca City Of | Winnemucca, NV | 8,518 | 223 | Clean |
| NE Sammamish Sewer & Water District | Sammamish, WA | 8,516 | 19 | Clean |
| Edmonton Water Works | Edmonton, KY | 8,515 | 94 | Clean |
| Cmu - Lake Caroline | Canton, MS | 8,511 | 283 | Clean |
| Sallisaw | Sallisaw, OK | 8,510 | 60 | Clean |
| Dillsburg Area Authority | Dillsburg, PA | 8,506 | 194 | Detected |