North Dakota water quality by county
53 counties with public water systems. Pick a county to see every system that serves it.
| County | Active systems | People served | Share with violations, 3 yr | Serious violators | Health flags |
|---|---|---|---|---|---|
| Adams County | 2 | 1,388 | 0 | 0 | |
| Barnes County | 9 | 12,391 | 0 | 0 | |
| Benson County | 6 | 1,538 | 0 | 0 | |
| Billings County | 5 | 1,139 | 0 | 0 | |
| Bottineau County | 21 | 5,903 | 0 | 0 | |
| Bowman County | 3 | 1,920 | 0 | 0 | |
| Burke County | 7 | 1,146 | 0 | 0 | |
| Burleigh County | 12 | 92,574 | 0 | 0 | |
| Cass County | 27 | 176,764 | 0 | 1 | |
| Cavalier County | 5 | 4,570 | 0 | 0 | |
| Dickey County | 8 | 4,858 | 0 | 0 | |
| Divide County | 3 | 1,562 | 0 | 0 | |
| Dunn County | 7 | 1,525 | 0 | 0 | |
| Eddy County | 2 | 1,595 | 0 | 0 | |
| Emmons County | 6 | 5,867 | 0 | 0 | |
| Foster County | 3 | 2,611 | 0 | 0 | |
| Golden Valley County | 3 | 1,098 | 0 | 0 | |
| Grand Forks County | 9 | 69,787 | 0 | 0 | |
| Grant County | 5 | 1,224 | 0 | 0 | |
| Griggs County | 5 | 3,503 | 0 | 0 | |
| Hettinger County | 3 | 1,481 | 0 | 0 | |
| Kidder County | 3 | 832 | 0 | 0 | |
| LaMoure County | 10 | 2,292 | 0 | 0 | |
| Logan County | 2 | 1,102 | 0 | 0 | |
| McHenry County | 7 | 2,316 | 0 | 0 | |
| McIntosh County | 5 | 1,917 | 0 | 0 | |
| McKenzie County | 16 | 12,466 | 0 | 0 | |
| McLean County | 13 | 9,697 | 1 | 0 | |
| Mercer County | 10 | 10,695 | 0 | 0 | |
| Morton County | 13 | 29,721 | 0 | 0 | |
| Mountrail County | 4 | 1,436 | 0 | 0 | |
| Nelson County | 6 | 4,204 | 0 | 0 | |
| Oliver County | 2 | 738 | 0 | 0 | |
| Pembina County | 8 | 7,930 | 0 | 0 | |
| Pierce County | 3 | 3,994 | 0 | 0 | |
| Ramsey County | 3 | 12,603 | 0 | 0 | |
| Ransom County | 5 | 4,835 | 0 | 0 | |
| Renville County | 3 | 1,405 | 0 | 0 | |
| Richland County | 14 | 15,546 | 0 | 0 | |
| Rolette County | 7 | 3,723 | 0 | 1 | |
| Sargent County | 5 | 2,183 | 0 | 0 | |
| Sheridan County | 2 | 478 | 0 | 0 | |
| Sioux County | 0 | 0 | 0 | 0 | |
| Slope County | 1 | 136 | 0 | 0 | |
| Stark County | 8 | 36,506 | 0 | 0 | |
| Steele County | 3 | 799 | 0 | 0 | |
| Stutsman County | 9 | 22,008 | 0 | 0 | |
| Towner County | 3 | 1,335 | 0 | 0 | |
| Traill County | 5 | 7,644 | 0 | 0 | |
| Walsh County | 5 | 9,366 | 0 | 0 | |
| Ward County | 14 | 65,645 | 0 | 0 | |
| Wells County | 6 | 6,057 | 0 | 0 | |
| Williams County | 22 | 38,366 | 0 | 0 |
under 30% 30 to 59% 60% and over
About this data
Share with violations counts any violation in the past three years, including monitoring and reporting lapses. Counts cover active systems; systems serving more than one county are counted in each.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The North Dakota records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.