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 |
|---|---|---|---|---|
| Wasilla Water System | Wasilla, AK | 18,492 | 224 | Detected |
| West Lamar Water Assn #1 | Hattiesburg, MS | 18,491 | 708 | Clean |
| Modern Electric Water Co | Spokane, WA | 18,487 | 262 | Clean |
| City of Brenham | Brenham, TX | 18,469 | 56 | Detected |
| Franklin Park | Franklin Park, IL | 18,467 | 41 | Clean |
| Grovetown | Grovetown, GA | 18,464 | 64 | - |
| Justice-Willow Springs Water Commission | Justice, IL | 18,457 | 26 | Clean |
| Wallkill Consolidated WD | Middletown, NY | 18,450 | 472 | - |
| Nps Ggnra | Sausalito, CA | 18,447 | 22 | Clean |
| Hardinsburg Ro WTP | Hardinsburg, KY | 18,437 | 266 | Clean |
| Newton, City Of | Newton, KS | 18,433 | 19 | Clean |
| City of Terrell | Terrell, TX | 18,432 | 7 | Detected |
| Round Lake | Round Lake, IL | 18,430 | 33 | Clean |
| Sudbury Water District | Sudbury, MA | 18,416 | 284 | Detected |
| Cherokee Water System | Cherokee, 04 | 18,415 | 3 | Clean |
| Newton, City Of | Newton, NC | 18,407 | 239 | Detected |
| Laguna Beach County WD | Laguna Beach, CA | 18,404 | 2 | Clean |
| Albemarle, City Of | Albemarle, NC | 18,396 | 97 | Detected |
| St Tam Parish- Bedico -Faubourg-Coquille | Covington, LA | 18,372 | 9 | Clean |
| Logansport Municipal Utility-Well Field | Logansport, IN | 18,369 | 71 | Clean |
| Graham, City Of | Graham, NC | 18,354 | 37 | Detected |
| North Aurora | North Aurora, IL | 18,350 | 210 | Clean |
| Fremont City | Fremont, OH | 18,319 | 228 | Clean |
| Brushy Creek MUD | Round Rock, TX | 18,314 | 45 | Detected |
| Somerset Water Department | Somerset, MA | 18,303 | 34 | Clean |
| South Island Psd (Sc0720001) | Hilton Head Island, SC | 18,299 | 3 | Clean |
| Matteson | Matteson, IL | 18,293 | 39 | Clean |
| Laurinburg, City Of | Laurinburg, NC | 18,288 | 69 | Clean |
| West Richland City Of | West Richland, WA | 18,280 | 63 | Clean |
| Colonial Heights, City Of | Colonial Heights, VA | 18,273 | 7 | Detected |
| York County West WD (Sc4620003) | York, SC | 18,273 | 37 | Detected |
| Pembroke Water Division Dpw | Pembroke, MA | 18,251 | 42 | Detected |
| Brunswick/Topsham Water District | Topsham, ME | 18,250 | 109 | Clean |
| Broad River Water Authority | Rutherfordton, NC | 18,242 | 31 | Detected |
| Aquarion-Plainville Regional | Shelton, CT | 18,231 | 63 | Detected |
| Northern Ohio Rural Water | Norwalk, OH | 18,224 | 1 | Clean |
| Farmington PWS | Farmington, MO | 18,217 | 551 | Detected |
| McAlester PWA | McAlester, OK | 18,206 | 984 | Clean |
| Camden City of (2810001) | Camden, SC | 18,193 | 33 | Detected |
| Cayey Urbano | Cayey, PR | 18,185 | 438 | Detected |
| Sahuarita Water Company | Sahuarita, AZ | 18,178 | 101 | Clean |
| Lafayette | Lafayette, GA | 18,177 | 8 | Detected |
| Northwest Park MUD | Houston, TX | 18,168 | 17 | Clean |
| Lcf Water District (Sc4220010) | Chesnee, SC | 18,152 | 3 | Clean |
| Lago del Oro Water Company | Sun Lakes, AZ | 18,132 | 777 | Detected |
| Wheatfield WD | North Tonawanda, NY | 18,117 | 0 | Clean |
| California Water Service Co.-Travis Afb | San Jose, CA | 18,111 | 20 | Clean |
| Clear Brook City MUD | Houston, TX | 18,108 | 40 | Detected |
| City of Gainesville | Gainesville, TX | 18,107 | 39 | Clean |
| Bastrop Water System | Bastrop, LA | 18,105 | 26 | Clean |