State Well Water Guide
West Virginia Private Well Water Guide
West Virginia has one of the highest rates of private well reliance in the eastern US — approximately 38% of residents use private wells, with usage concentrated in the rural Appalachian counties that make up most of the state. Coal mining and natural gas extraction create unique contamination risks: acid mine drainage, heavy metals from coal seams, and methane from oil and gas operations can affect groundwater quality. Naturally occurring iron, manganese, and sulfates from geological sources are also pervasive. WVDHHR regulates well construction but testing is voluntary for existing wells.
Testing Guidance
WVDHHR recommends annual testing for coliform bacteria, nitrates, pH, and iron/manganese for all wells. Well owners near coal mines or mining spoil should test for iron, manganese, sulfate, and total dissolved solids. Well owners near oil and gas operations should test for methane, barium, and strontium. All wells should have baseline pH testing given the state's acid mine drainage concerns.
What to Test For in West Virginia
Total coliform bacteria and E. coli — annual minimum
Iron and manganese — extremely common throughout the state from geological and mining sources
pH and sulfate — acid mine drainage indicators; critical for wells near historical coal operations
Total dissolved solids — overall water quality indicator
Barium and strontium — near oil and gas drilling operations
Methane — near active and abandoned oil and gas wells; explosion hazard
Arsenic and selenium — coal-bearing formations can release both into groundwater
Nitrates — rural agricultural areas and denser septic areas
Common Contamination Risks in West Virginia
Acid mine drainage from historical coal mining — the most pervasive groundwater quality issue in West Virginia, affecting iron, manganese, and pH in hundreds of communities
Methane from oil and gas operations — both naturally occurring and induced by drilling operations; can make well water undrinkable and creates explosion risk
Heavy metals (iron, manganese, arsenic, selenium) from coal seams and mining operations — widespread throughout the southern coalfields
Bacterial contamination from failing septic systems — rural WV has high rates of aging and failing septic infrastructure
Naturally high sulfate and TDS from sedimentary geology — affects taste and causes laxative effects at high levels
Contaminant Guides Relevant to WV Wells
PFAS
Synthetic Chemicals
EPA limit: 4 ppt
Lead
Heavy Metals
EPA limit: 15 ppb (action level)
Nitrates
Agricultural Chemicals
EPA limit: 10 mg/L
DBPs
Disinfection Byproducts
EPA limit: 80 µg/L (TTHMs) / 60 µg/L (HAA5)
Arsenic
Heavy Metals
EPA limit: 10 ppb
Hard Water
Minerals
EPA limit: No federal limit
Chlorine
Disinfection Chemicals
EPA limit: 4 mg/L (MRDL)
Microplastics
Emerging Contaminants
EPA limit: No federal limit
Bacteria
Microbial Contamination
EPA limit: Zero E. coli / < 1 coliform per 100 mL
Fluoride
Minerals
EPA limit: 4 mg/L (MCL) / 2 mg/L (Secondary MCL)
Chromium-6
Heavy Metals
EPA limit: 100 ppb (total chromium)
Copper
Heavy Metals
EPA limit: 1.3 mg/L (action level)
Radon
Radioactive Contaminants
EPA limit: No finalized MCL
Iron & Manganese
Minerals
EPA limit: 0.3 mg/L iron / 0.05 mg/L manganese (aesthetic SMCLs)
Atrazine
Agricultural Chemicals
EPA limit: 3 ppb (0.003 mg/L)
Uranium
Radioactive Contaminants
EPA limit: 30 µg/L (30 ppb)
Perchlorate
Industrial Chemicals
EPA limit: 0.056 mg/L (56 ppb)
VOCs
Industrial Chemicals
EPA limit: Varies by compound: benzene 5 ppb; TCE 5 ppb; PCE 5 ppb; vinyl chloride 2 ppb
Radium
Radioactive Contaminants
EPA limit: 5 pCi/L (combined Ra-226 + Ra-228)
Crypto & Giardia
Microbial Contamination
EPA limit: Zero (treatment technique standard)
Hydrogen Sulfide
Naturally Occurring Compounds
EPA limit: No MCL; Secondary MCL (aesthetic) of 0.05 mg/L
Selenium
Minerals
EPA limit: 50 ppb (0.05 mg/L)
Cadmium
Heavy Metals
EPA limit: 5 ppb (0.005 mg/L)
Mercury
Heavy Metals
EPA limit: 2 ppb (0.002 mg/L)
Barium
Heavy Metals
EPA limit: 2 mg/L
Find a Certified Lab in West Virginia
Use the West Virginia state-certified laboratory program to find accredited labs for private well testing. Always verify current certification before submitting samples.
WV Certified Lab Directory ↗West Virginia Well Water FAQs
Related Pages
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
Quick Reference
State program
WV Certified Labs ↗EPA guidance
EPA Private Wells Program ↗State lab directory
WV Certified Labs ↗Minimum Annual Tests
Plus state-specific contaminants listed above
Other State Guides