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 |
|---|---|---|---|---|
| Ganado-Burnside-Cornfield-Steamboat NTUA | Ft Defiance, NN | 3,947 | 183 | Detected |
| Knox County Public Water & Sewer Dist 1 | Knox City, MO | 3,947 | 41 | Detected |
| Marshall | Marshall, IL | 3,947 | 58 | Clean |
| Joint Regional Water Supply System | Laguna Beach, CA | 3,947 | 0 | - |
| Kettering Health Main Campus | Hamilton, OH | 3,946 | 4 | - |
| Greenwood Isd | Midland, TX | 3,945 | 311 | - |
| Collinsville Water Works | Collinsville, AL | 3,945 | 21 | Detected |
| Union Springs Util Board | Union Springs, AL | 3,945 | 52 | Detected |
| Gauley River Psd | Swiss, WV | 3,944 | 79 | Clean |
| Caribou Utilities District | Caribou, ME | 3,943 | 84 | Clean |
| Wenham Water Dept. | Wenham, MA | 3,942 | 23 | Detected |
| Madras, City Of | Madras, OR | 3,940 | 123 | Clean |
| Frederick | Frederick, OK | 3,940 | 797 | Detected |
| East Montgomery County MUD 6 | Houston, TX | 3,939 | 4 | - |
| Cross Country WSC | China Spring, TX | 3,939 | 124 | Clean |
| Harris County MUD 6 Carriage Lane | Houston, TX | 3,936 | 6 | Detected |
| Algoma TN Sanitary Dist 1 | Oshkosh, WI | 3,935 | 0 | - |
| Mannford | Mannford, OK | 3,935 | 751 | Detected |
| St James PWS | St James, MO | 3,935 | 43 | Detected |
| Southern Water | Houston, TX | 3,933 | 18 | Clean |
| Shohola Falls Trails End Sys#2 | Shohola, PA | 3,933 | 175 | Clean |
| Abbeville Water Works & Sewer Board | Abbeville, AL | 3,933 | 329 | Clean |
| Kiel Waterworks | Kiel, WI | 3,932 | 36 | Clean |
| South Fulton Water System | South Fulton, TN | 3,932 | 37 | Clean |
| Niota Water System | Niota, TN | 3,932 | 34 | Clean |
| Cabelas - Richfield | Richfield, WI | 3,931 | 0 | Clean |
| Grady Co RWD #6 | Amber, OK | 3,930 | 173 | Clean |
| Silverwood | Athol, ID | 3,930 | 88 | - |
| Watts Bar East U.d. | Kingston, TN | 3,927 | 15 | Detected |
| Corinth Pwd | Pittsburg, IL | 3,927 | 16 | Detected |
| Choctaw | Choctaw, OK | 3,926 | 270 | Clean |
| Wintersville Village PWS | Wintersville, OH | 3,924 | 14 | Clean |
| South Chicago Heights | South Chicago Heights, IL | 3,924 | 18 | Clean |
| Saline Valley Conservancy District | Eldorado, IL | 3,921 | 31 | Clean |
| Genesee WSD | Golden, CO | 3,920 | 180 | Clean |
| Nome Joint Utility System | Nome, AK | 3,920 | 174 | Clean |
| Del Mar, City Of | Del Mar, CA | 3,919 | 10 | Clean |
| Eula WSC | Clyde, TX | 3,918 | 151 | Detected |
| Williamston, City Of | Williamston, MI | 3,917 | 22 | Clean |
| Westville | Westville, IL | 3,917 | 90 | Clean |
| Pennfield Township | Battle Creek, MI | 3,916 | 93 | Clean |
| Bighorn - Desert View Water Agency | Yucca Valley, CA | 3,916 | 15 | - |
| Cozad, City Of | Cozad, NE | 3,915 | 19 | Clean |
| Hayden Town Of | Hayden, CO | 3,915 | 86 | Clean |
| Village of Pine Ridge (Consec) | The Villages, FL | 3,914 | 0 | Detected |
| City of Castroville | Castroville, TX | 3,913 | 57 | - |
| Lonsdale | Lonsdale, MN | 3,913 | 40 | Clean |
| Cresco Waterworks | Cresco, IA | 3,913 | 178 | Clean |
| Dalzell Water District (Sc4320001) | Sumter, SC | 3,912 | 21 | Clean |
| Meadows-At-Woodrun | Quincy, FL | 3,912 | 7 | Clean |