West Virginia water quality by county
55 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 |
|---|---|---|---|---|---|
| Barbour County | 9 | 15,143 | 2 | 0 | |
| Berkeley County | 23 | 97,378 | 9 | 4 | |
| Boone County | 3 | 140 | 1 | 1 | |
| Braxton County | 7 | 12,204 | 0 | 0 | |
| Brooke County | 8 | 37,813 | 4 | 1 | |
| Cabell County | 2 | 104,093 | 0 | 0 | |
| Calhoun County | 3 | 3,911 | 2 | 2 | |
| Clay County | 6 | 5,324 | 1 | 1 | |
| Doddridge County | 3 | 1,968 | 1 | 1 | |
| Fayette County | 12 | 37,599 | 7 | 7 | |
| Gilmer County | 7 | 5,731 | 1 | 1 | |
| Grant County | 9 | 12,246 | 3 | 1 | |
| Greenbrier County | 35 | 30,022 | 22 | 14 | |
| Hampshire County | 33 | 8,477 | 20 | 11 | |
| Hancock County | 9 | 19,456 | 5 | 3 | |
| Hardy County | 22 | 8,383 | 6 | 2 | |
| Harrison County | 22 | 66,525 | 7 | 3 | |
| Jackson County | 10 | 24,050 | 3 | 1 | |
| Jefferson County | 44 | 34,629 | 28 | 8 | |
| Kanawha County | 4 | 223,151 | 2 | 1 | |
| Lewis County | 3 | 16,064 | 1 | 0 | |
| Lincoln County | 8 | 12,210 | 6 | 3 | |
| Logan County | 10 | 34,221 | 6 | 7 | |
| Marion County | 27 | 58,115 | 8 | 7 | |
| Marshall County | 15 | 30,559 | 3 | 2 | |
| Mason County | 12 | 24,428 | 6 | 4 | |
| McDowell County | 24 | 14,906 | 11 | 12 | |
| Mercer County | 13 | 31,615 | 5 | 4 | |
| Mineral County | 16 | 22,240 | 6 | 2 | |
| Mingo County | 14 | 15,384 | 9 | 11 | |
| Monongalia County | 11 | 83,164 | 4 | 3 | |
| Monroe County | 4 | 6,594 | 1 | 1 | |
| Morgan County | 24 | 5,743 | 11 | 1 | |
| Nicholas County | 9 | 24,847 | 3 | 2 | |
| Ohio County | 10 | 44,754 | 0 | 1 | |
| Pendleton County | 17 | 3,472 | 8 | 2 | |
| Pleasants County | 3 | 6,071 | 0 | 0 | |
| Pocahontas County | 37 | 7,965 | 26 | 12 | |
| Preston County | 76 | 32,349 | 10 | 2 | |
| Putnam County | 4 | 35,500 | 1 | 1 | |
| Raleigh County | 17 | 73,148 | 7 | 5 | |
| Randolph County | 29 | 25,716 | 17 | 12 | |
| Ritchie County | 5 | 4,675 | 4 | 3 | |
| Roane County | 6 | 8,350 | 3 | 3 | |
| Summers County | 16 | 22,802 | 8 | 7 | |
| Taylor County | 5 | 16,717 | 4 | 1 | |
| Tucker County | 20 | 8,630 | 11 | 3 | |
| Tyler County | 5 | 7,127 | 2 | 2 | |
| Upshur County | 8 | 21,898 | 1 | 0 | |
| Wayne County | 10 | 35,069 | 3 | 2 | |
| Webster County | 6 | 3,789 | 1 | 0 | |
| Wetzel County | 6 | 13,141 | 4 | 2 | |
| Wirt County | 1 | 2,289 | 0 | 0 | |
| Wood County | 10 | 86,977 | 2 | 0 | |
| Wyoming County | 19 | 15,436 | 10 | 10 |
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 West Virginia 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.