Private Well Water Testing in Vermont
County-by-county USGS area-risk estimates for private wells across Vermont — arsenic exceedance probability and private-well population — plus how to test your own well at a Vermont-certified laboratory.
Vermont private-well risk summary
Counties covered
14
Vermont counties with modeled risk data.
People on private wells
area estimate206,283
estimated across covered Vermont counties.
Average arsenic risk
area estimate5%
average modeled chance a well exceeds 10 µg/L arsenic across covered counties.
Vermont counties
- Windsor County7% arsenic exceedance (area estimate)24,335 people on private wells
- Chittenden County5% arsenic exceedance (area estimate)24,087 people on private wells
- Windham County6% arsenic exceedance (area estimate)22,692 people on private wells
- Rutland County4% arsenic exceedance (area estimate)21,222 people on private wells
- Washington County5% arsenic exceedance (area estimate)17,728 people on private wells
- Franklin County6% arsenic exceedance (area estimate)15,945 people on private wells
- Addison County3% arsenic exceedance (area estimate)15,626 people on private wells
- Orange County6% arsenic exceedance (area estimate)15,622 people on private wells
- Bennington County2% arsenic exceedance (area estimate)13,898 people on private wells
- Lamoille County4% arsenic exceedance (area estimate)10,571 people on private wells
- Caledonia County5% arsenic exceedance (area estimate)10,552 people on private wells
- Orleans County6% arsenic exceedance (area estimate)9,919 people on private wells
- Grand Isle County6% arsenic exceedance (area estimate)2,073 people on private wells
- Essex County5% arsenic exceedance (area estimate)2,013 people on private wells
Find a Vermont-certified testing lab
Get your well tested at a Vermont-certified laboratory. We list certification programs by state.
Already tested your well? Get a free plain-English reading
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.
Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.
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.
Stay Informed About Your Water Quality
Get EPA reports, filter recommendations, and safety alerts for your area.
Join 10,000+ people protecting their families. Unsubscribe anytime.