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 |
|---|---|---|---|---|
| Quebrada Arenas | San Lorenzo, PR | 4,451 | 0 | - |
| Mifflintown Muni Auth | Mifflintown, PA | 4,450 | 321 | Clean |
| Slatington Borough Water Sys | Slatington, PA | 4,450 | 112 | Clean |
| Columbia Falls City Of | Columbia Falls, MT | 4,450 | 99 | Clean |
| Goodland, City Of | Goodland, KS | 4,450 | 119 | Clean |
| Town of Elizabeth | Elizabeth, IN | 4,450 | 87 | Clean |
| Harris County MUD 104 | Houston, TX | 4,449 | 1 | Detected |
| United Water System | Arnaudville, LA | 4,446 | 209 | Clean |
| Clay Road MUD | Houston, TX | 4,443 | 4 | Detected |
| Town of Bar Harbor- Water Division | Bar Harbor, ME | 4,443 | 5 | Detected |
| Rocky Ford City Of | Rocky Ford, CO | 4,443 | 337 | Detected |
| Baldwin Waterworks | Baldwin, WI | 4,440 | 19 | Clean |
| Glen Canyon Nra Wahweap | Page, AZ | 4,439 | 403 | Detected |
| Atkins Water System | Atkins, AR | 4,439 | 88 | Clean |
| Pearl River Central W/a-Henley Field | McNeill, MS | 4,438 | 495 | Clean |
| Northwest Clay County Utility | Moss, TN | 4,437 | 80 | Detected |
| Wayland | Wayland, MI | 4,435 | 25 | Clean |
| Indiana American Water - Sheridan | Greenwood, IN | 4,435 | 9 | - |
| Waverly City PWS | Waverly, OH | 4,433 | 79 | Detected |
| Dawsonville | Dawsonville, GA | 4,433 | 37 | - |
| Belfair Water District 1 | Belfair, WA | 4,432 | 151 | - |
| Narragansett Water Dept-North End | Narragansett, RI | 4,432 | 130 | Detected |
| South Side U.d. #1 | Gordonsville, TN | 4,431 | 12 | Clean |
| Fredericktown PWS | Fredricktown, MO | 4,429 | 130 | Clean |
| City of Three Rivers | Three Rivers, TX | 4,428 | 124 | Detected |
| Many Water System | Many, LA | 4,428 | 122 | Clean |
| Cawood Water District | Cawood, KY | 4,428 | 121 | Clean |
| Canaan Utilities | Canaan, IN | 4,428 | 12 | Detected |
| West Cape May Water Dept | West Cape May, NJ | 4,427 | 43 | Clean |
| Hollister PWS | Hollister, MO | 4,426 | 33 | Clean |
| Palmyra Water Works | Paoli, IN | 4,425 | 73 | Detected |
| Friendship Water Works | Tallassee, AL | 4,425 | 108 | Detected |
| Lafayette, City Of | Lafayette, OR | 4,423 | 270 | Clean |
| Red Springs, Town Of | Red Springs, NC | 4,423 | 99 | Clean |
| California PWS | California, MO | 4,423 | 36 | Clean |
| McCall City Of | McCall, ID | 4,423 | 205 | Clean |
| Montgomery County MUD 19 | Houston, TX | 4,422 | 12 | Clean |
| Upton Dpw Water/Wastewater Division | Upton, MA | 4,420 | 169 | Clean |
| Buffalo, City Of | Buffalo, WY | 4,419 | 45 | Clean |
| Sws-Landrum WTP (Sc4210003) | Spartanburg, SC | 4,419 | 36 | Clean |
| Gcwsd Kilsock Water Sys (Sc2220002) | Pawleys Island, SC | 4,417 | 6 | Clean |
| North River/Mill Creek Water Service Dis | Charlotte, NC | 4,417 | 739 | - |
| Palomar Observatory | Palomar Mountain, CA | 4,416 | 21 | - |
| South Marengo Co Water & Fire Pro Auth | Linden, AL | 4,416 | 17 | Detected |
| Lakewood Campground (Sc2660049) | Myrtle Beach, SC | 4,415 | 20 | Clean |
| South Bainbridge | Poulsbo, WA | 4,414 | 660 | - |
| Harris County MUD 397 | Houston, TX | 4,413 | 1 | Clean |
| Town of Perryville | Perryville, MD | 4,413 | 196 | Clean |
| Sullivan County PWSD 1 | Milan, MO | 4,412 | 2 | Clean |
| City of Justin | Justin, TX | 4,409 | 24 | Detected |