Radon levels in Vermont: Low
The model predicts a population-weighted basement average of 1.7 pCi/L across Vermont's 14 counties - close to the US average of 1.8 pCi/L. Above-ground floors average 1.0 pCi/L.
Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.
0 / 14
EPA Zone 1 counties (0%)
12 / 2
Zone 2 / Zone 3 counties
0
counties predicted ≥ 4 pCi/L
0%
of ZIP codes predicted ≥ 4 pCi/L
Vermont counties by predicted radon
Sorted highest to lowest predicted basement average. 14 counties.
| County | Predicted basement | Upstairs | Grade | EPA zone | ZIPs |
|---|---|---|---|---|---|
| Bennington County | 2.0 pCi/L | 1.2 | Low | EPA Zone 2 | 15 |
| Washington County | 2.0 pCi/L | 1.1 | Low | EPA Zone 2 | 18 |
| Windsor County | 1.9 pCi/L | 1.1 | Low | EPA Zone 2 | 28 |
| Essex County | 1.9 pCi/L | 1.1 | Low | EPA Zone 2 | 11 |
| Orange County | 1.9 pCi/L | 1.1 | Low | EPA Zone 2 | 26 |
| Windham County | 1.9 pCi/L | 1.0 | Low | EPA Zone 2 | 23 |
| Orleans County | 1.8 pCi/L | 1.0 | Low | EPA Zone 2 | 22 |
| Caledonia County | 1.8 pCi/L | 1.1 | Low | EPA Zone 2 | 14 |
| Lamoille County | 1.8 pCi/L | 1.0 | Low | EPA Zone 2 | 11 |
| Rutland County | 1.8 pCi/L | 1.1 | Low | EPA Zone 2 | 25 |
| Franklin County | 1.6 pCi/L | 0.9 | Low | EPA Zone 2 | 13 |
| Addison County | 1.6 pCi/L | 0.8 | Low | EPA Zone 2 | 15 |
| Grand Isle County | 1.5 pCi/L | 0.8 | Low | EPA Zone 3 | 5 |
| Chittenden County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 16 |
Vermont radon questions
- Is radon high in Vermont?
- Vermont's population-weighted predicted basement average is 1.7 pCi/L, close to the US average of 1.8. 0 of its 14 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 0 are in the 2-4 "consider fixing" range and 14 are below 2. 0% of Vermont ZIP codes are predicted at 4 or higher.
- Which Vermont county has the highest radon?
- Bennington County has the highest predicted basement average in Vermont at 2.0 pCi/L (EPA Zone 2). The lowest is Chittenden County at 1.4 pCi/L. These are modeled area averages; individual homes in any county can test far higher.
- How many EPA Zone 1 counties are in Vermont?
- 0 of Vermont's 14 counties (0%) are EPA Zone 1 (highest potential), 12 are Zone 2 and 2 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.
- Should I test for radon in Vermont?
- Yes. Even though Vermont's predicted average is below 2 pCi/L, the EPA recommends every home be tested - radon varies house to house, and 13.6% of Vermont ZIP codes are still predicted at 2 pCi/L or higher.
Vermont radon program
Many states offer free or discounted test kits and keep lists of certified mitigators. Find the Vermont radon office through the EPA state radon contacts page. Then read how to test and what mitigation costs.