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 |
|---|---|---|---|---|
| Santa Isabel Urbano | Santa Isabel, PR | 39,884 | 443 | Detected |
| El Mirage City Of | El Mirage, AZ | 39,884 | 1,007 | Detected |
| Morristown Utilities Commission | Morristown, TN | 39,883 | 20 | Detected |
| Carol Stream | Carol Stream, IL | 39,854 | 23 | Detected |
| Avalon Water and Sewerage Utilities | Avalon, NJ | 39,839 | 143 | Clean |
| Park Ridge | Park Ridge, IL | 39,800 | 19 | Clean |
| Central Elmore Water & Sewer Authority | Wetumpka, AL | 39,798 | 53 | Clean |
| Dorado Urbano | Dorado, PR | 39,733 | 245 | Detected |
| Gswc - Claremont | San Dimas, CA | 39,730 | 6 | Detected |
| Wheeling | Wheeling, IL | 39,725 | 43 | Clean |
| Eustis, City of (4 Wtps) | Eustis, FL | 39,721 | 91 | Detected |
| Cottage Grove | Cottage Grove, MN | 39,712 | 3 | Detected |
| Hutchinson, City Of | Hutchinson, KS | 39,712 | 25 | Clean |
| San Luis City Of | San Luis, AZ | 39,705 | 682 | Clean |
| Santa Margarita Water District-Id9 | Rancho Santa Margarita, CA | 39,684 | 22 | Clean |
| Cedar City Waterworks | Cedar City, UT | 39,670 | 445 | Clean |
| Manville WSC | Coupland, TX | 39,648 | 55 | Detected |
| Streamwood | Streamwood, IL | 39,577 | 27 | Clean |
| Mobile County Water & Fire Pro Authority | Theodore, AL | 39,573 | 354 | Clean |
| Western Water Company | Morrow, OH | 39,508 | 67 | Detected |
| Dover Water Department | Dover, DE | 39,491 | 47 | Clean |
| Hilo | Hilo, HI | 39,477 | 170 | Clean |
| Bella Vista POA | Bella Vista, AR | 39,419 | 54 | Clean |
| City of Duncanville | Duncanville, TX | 39,413 | 29 | Detected |
| Wayne Water Districts | Goldsboro, NC | 39,403 | 704 | Detected |
| San Gabriel County WD | Rosemead, CA | 39,345 | 0 | Clean |
| Fort Belvoir | Fort Belvoir, VA | 39,303 | 38 | Detected |
| Clermont East Water System (2 Wps) | Clermont, FL | 39,279 | 40 | Detected |
| Amherst Dpw Water Division | Amherst, MA | 39,263 | 42 | Clean |
| South Alabama Utilities Water System | Citronelle, AL | 39,249 | 426 | Detected |
| Southwest/Polk County Utility | Winter Haven, FL | 39,209 | 28 | Detected |
| Winslow Twp Dmu | Braddock, NJ | 39,174 | 812 | Detected |
| Harwich Water Department | Harwich, MA | 39,144 | 6 | Clean |
| Braintree Water and Sewer Dept. | Braintree, MA | 39,143 | 98 | Detected |
| Aqua NJ - Hamilton Square | Hamilton, NJ | 39,128 | 84 | Detected |
| Mount Dora, City of (2Wps) | Mount Dora, FL | 39,120 | 67 | Detected |
| Puyallup City Of | Puyallup, WA | 39,100 | 3 | Detected |
| American Fork City | Lehi, UT | 39,045 | 103 | Clean |
| Rock Island | Rock Island, IL | 39,018 | 145 | Detected |
| Westerville City PWS | Pataskala, OH | 39,000 | 32 | Detected |
| Farallon | Cayey, PR | 38,977 | 390 | - |
| King County Water District #20 | Seattle, WA | 38,974 | 3 | Clean |
| Oakland Park City Of | Oakland Park, FL | 38,905 | 52 | Clean |
| Yarmouth Water Department | West Yarmouth, MA | 38,900 | 54 | Detected |
| City of Livermore | Livermore, CA | 38,892 | 2 | Clean |
| Roy City Water System | Roy, UT | 38,800 | 428 | Clean |
| Bedford Regional Water Authority (Brwa) | Bedford, VA | 38,794 | 10 | Clean |
| Leavenworth Water Department | Leavenworth, KS | 38,757 | 30 | Clean |
| La Vergne Water System | Lavergne, TN | 38,730 | 92 | Detected |
| Murray City Water System | West Jordan, UT | 38,723 | 208 | Detected |