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.
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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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