West Virginia Water Quality
Drinking water data for all 55 counties.
Avg Water Score
35.2
State Grade
F
Counties with Data
54
of 55 total
All West Virginia Counties
| County | Water Score |
|---|---|
| Cabell County | 86.0 |
| Gilmer County | 86.0 |
| Lewis County | 86.0 |
| Pendleton County | 86.0 |
| Pleasants County | 86.0 |
| Putnam County | 86.0 |
| Upshur County | 86.0 |
| Wirt County | 86.0 |
| Kanawha County | 69.3 |
| Taylor County | 60.6 |
| Berkeley County | 59.9 |
| Monongalia County | 57.5 |
| Braxton County | 55.0 |
| Mason County | 53.1 |
| Wood County | 52.4 |
| Monroe County | 50.7 |
| Marshall County | 46.9 |
| Summers County | 40.3 |
| Jackson County | 37.1 |
| Marion County | 35.0 |
| Brooke County | 34.4 |
| Hancock County | 33.7 |
| Grant County | 33.6 |
| Nicholas County | 28.7 |
| Clay County | 28.0 |
| Fayette County | 27.0 |
| Barbour County | 25.7 |
| Wayne County | 25.5 |
| Hampshire County | 25.0 |
| Ohio County | 24.9 |
| Jefferson County | 22.4 |
| Preston County | 22.1 |
| Logan County | 21.9 |
| Raleigh County | 21.8 |
| Roane County | 21.0 |
| Harrison County | 19.0 |
| Lincoln County | 16.1 |
| Mineral County | 15.6 |
| Mercer County | 14.9 |
| Doddridge County | 14.6 |
| Morgan County | 14.5 |
| Randolph County | 13.5 |
| Wetzel County | 12.1 |
| Greenbrier County | 11.7 |
| Ritchie County | 8.8 |
| Webster County | 7.9 |
| Tyler County | 7.8 |
| Pocahontas County | 7.7 |
| Mingo County | 7.0 |
| Wyoming County | 6.2 |
| McDowell County | 6.1 |
| Calhoun County | 5.7 |
| Tucker County | 4.8 |
| Hardy County | 3.4 |
| Boone County | — |
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Frequently Asked Questions
Which county in West Virginia has the best water quality?
Cabell County has the highest water quality score in West Virginia at 86.0/100 (Grade: A), based on EPA SDWIS data.
Which county in West Virginia has the most water violations?
Hardy County has among the lowest water quality scores in West Virginia at 3.4/100. See the individual county page for detailed violation history.
Is the tap water safe to drink in West Virginia?
West Virginia has an average water quality score of 35.2/100 based on EPA Safe Drinking Water Act compliance data. Individual county scores vary — check your specific county's page for detailed information.
What contaminants are found in West Virginia water supplies?
Drinking water quality varies by county and water system. The EPA Safe Drinking Water Information System (SDWIS) tracks violations for contaminants like lead, nitrates, bacteria, and disinfection byproducts. See individual county pages for specific contaminant and violation history.
Data Source
Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.
Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.