Private Well Water Testing in West Virginia
County-by-county USGS area-risk estimates for private wells across West Virginia — arsenic exceedance probability and private-well population — plus how to test your own well at a West Virginia-certified laboratory.
West Virginia private-well risk summary
Counties covered
55
West Virginia counties with modeled risk data.
People on private wells
area estimate430,437
estimated across covered West Virginia counties.
Average arsenic risk
area estimate3%
average modeled chance a well exceeds 10 µg/L arsenic across covered counties.
West Virginia counties
- Kanawha County3% arsenic exceedance (area estimate)18,422 people on private wells
- Mingo County2% arsenic exceedance (area estimate)17,904 people on private wells
- Berkeley County2% arsenic exceedance (area estimate)17,797 people on private wells
- Hampshire County2% arsenic exceedance (area estimate)15,190 people on private wells
- Mercer County2% arsenic exceedance (area estimate)14,691 people on private wells
- Jefferson County2% arsenic exceedance (area estimate)14,404 people on private wells
- Jackson County3% arsenic exceedance (area estimate)13,753 people on private wells
- Boone County2% arsenic exceedance (area estimate)13,503 people on private wells
- Wayne County2% arsenic exceedance (area estimate)12,998 people on private wells
- Preston County2% arsenic exceedance (area estimate)12,673 people on private wells
- Lincoln County2% arsenic exceedance (area estimate)12,606 people on private wells
- Greenbrier County2% arsenic exceedance (area estimate)11,989 people on private wells
- Morgan County4% arsenic exceedance (area estimate)11,281 people on private wells
- Wyoming County2% arsenic exceedance (area estimate)10,594 people on private wells
- Logan County2% arsenic exceedance (area estimate)9,943 people on private wells
- Putnam County3% arsenic exceedance (area estimate)9,483 people on private wells
- Cabell County3% arsenic exceedance (area estimate)9,028 people on private wells
- Mineral County2% arsenic exceedance (area estimate)8,894 people on private wells
- Roane County3% arsenic exceedance (area estimate)8,829 people on private wells
- Wood County3% arsenic exceedance (area estimate)8,147 people on private wells
- Summers County3% arsenic exceedance (area estimate)8,143 people on private wells
- McDowell County2% arsenic exceedance (area estimate)7,934 people on private wells
- Nicholas County2% arsenic exceedance (area estimate)7,806 people on private wells
- Fayette County3% arsenic exceedance (area estimate)7,747 people on private wells
- Harrison County3% arsenic exceedance (area estimate)7,695 people on private wells
- Hardy County2% arsenic exceedance (area estimate)7,384 people on private wells
- Braxton County2% arsenic exceedance (area estimate)7,309 people on private wells
- Randolph County2% arsenic exceedance (area estimate)7,249 people on private wells
- Upshur County2% arsenic exceedance (area estimate)7,040 people on private wells
- Mason County3% arsenic exceedance (area estimate)6,866 people on private wells
- Lewis County2% arsenic exceedance (area estimate)6,848 people on private wells
- Monroe County2% arsenic exceedance (area estimate)6,769 people on private wells
- Doddridge County3% arsenic exceedance (area estimate)6,609 people on private wells
- Gilmer County3% arsenic exceedance (area estimate)6,371 people on private wells
- Clay County2% arsenic exceedance (area estimate)6,094 people on private wells
- Wetzel County3% arsenic exceedance (area estimate)5,494 people on private wells
- Ritchie County3% arsenic exceedance (area estimate)5,299 people on private wells
- Pocahontas County2% arsenic exceedance (area estimate)5,020 people on private wells
- Raleigh County2% arsenic exceedance (area estimate)5,000 people on private wells
- Calhoun County3% arsenic exceedance (area estimate)4,914 people on private wells
- Monongalia County3% arsenic exceedance (area estimate)4,355 people on private wells
- Tyler County3% arsenic exceedance (area estimate)4,252 people on private wells
- Barbour County3% arsenic exceedance (area estimate)4,251 people on private wells
- Marshall County3% arsenic exceedance (area estimate)4,054 people on private wells
- Webster County1% arsenic exceedance (area estimate)3,341 people on private wells
- Wirt County3% arsenic exceedance (area estimate)3,060 people on private wells
- Hancock County4% arsenic exceedance (area estimate)2,910 people on private wells
- Pendleton County2% arsenic exceedance (area estimate)2,787 people on private wells
- Marion County3% arsenic exceedance (area estimate)2,722 people on private wells
- Taylor County3% arsenic exceedance (area estimate)2,438 people on private wells
- Pleasants County3% arsenic exceedance (area estimate)2,351 people on private wells
- Grant County2% arsenic exceedance (area estimate)2,289 people on private wells
- Brooke County3% arsenic exceedance (area estimate)2,222 people on private wells
- Ohio County2% arsenic exceedance (area estimate)2,053 people on private wells
- Tucker County2% arsenic exceedance (area estimate)1,632 people on private wells
Find a West Virginia-certified testing lab
Get your well tested at a West Virginia-certified laboratory. We list certification programs by state.
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Upload your well water lab report (PDF or a photo) and our team will email you a full, plain-English reading of every result — free. Educational only, never medical advice.
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Upload my well testThese figures are USGS area estimates: statistical groundwater models describing how likely elevated contaminant levels are across a county. They are not designed to predict the concentration in any single well. Only testing your own well reveals its water quality.
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