Radon in Vermont

About 1 in 4 homes tested in Vermont were at or above the EPA action level of 4 pCi/L.

52%26%22%

7,200 homes tested, 2008–2017

The line marks the EPA action level, 4 pCi/L.

The EPA puts 0 of Vermont's 14 counties in Zone 1, its highest radon category, 12 in Zone 2 and 2 in Zone 3.

Every county in Vermont

Sorted by the share of homes tested at or above 4 pCi/L. Select a county for local details and costs.

County	Homes tested	At or above 4	Median	EPA zone
Orange County		38%	2.9 pCi/L	2
Caledonia County		37%	2.7 pCi/L	2
Grand Isle County		36%	2.6 pCi/L	3
Essex County	11 tests	–	–	2
Windsor County		26%	2.2 pCi/L	2
Bennington County		26%	2.0 pCi/L	2
Washington County		25%	2.2 pCi/L	2
Orleans County		25%	1.8 pCi/L	2
Rutland County		25%	1.9 pCi/L	2
Lamoille County		22%	2.1 pCi/L	2
Addison County		22%	1.7 pCi/L	2
Windham County		18%	1.7 pCi/L	2
Chittenden County		14%	1.4 pCi/L	3
Franklin County		12%	1.3 pCi/L	2

"–" means fewer than 20 tests or no lab data, too few for a reliable figure.

EPA Map of Radon Zones (public domain).
CDC Environmental Public Health Tracking Network, radon tests from labs, 2008–2017. Pre-mitigation tests only.