Radon levels in Vermont

Verified county-level radon indicators are available for 14 Vermont counties. Select a county for its source period and sample details.

High results are most common in Orange County (38%) and least common in Franklin County (12%)Share of tests at or above 4 pCi/L by county · Radon test results from laboratories, 2008–2017 · 14 of 14 counties have data
Addison County: 22% of tests at or above 4 pCi/L · 433 testsBennington County: 26% of tests at or above 4 pCi/L · 733 testsCaledonia County: 37% of tests at or above 4 pCi/L · 153 testsChittenden County: 14% of tests at or above 4 pCi/L · 2,711 testsEssex County: 33% of tests at or above 4 pCi/L · 15 testsFranklin County: 12% of tests at or above 4 pCi/L · 261 testsGrand Isle County: 36% of tests at or above 4 pCi/L · 53 testsLamoille County: 22% of tests at or above 4 pCi/L · 760 testsOrange County: 38% of tests at or above 4 pCi/L · 465 testsOrleans County: 25% of tests at or above 4 pCi/L · 114 testsRutland County: 25% of tests at or above 4 pCi/L · 1,060 testsWashington County: 25% of tests at or above 4 pCi/L · 1,357 testsWindham County: 18% of tests at or above 4 pCi/L · 1,127 testsWindsor County: 26% of tests at or above 4 pCi/L · 1,358 tests
  • Under 10%
  • 10–20%
  • 20–30%
  • 30–40%
  • 40% or more
  • No data

Counties

CountyTests% ≥ 4 pCi/LMedian (pCi/L)EPA zone (1993)Source
Addison County43322%1.7Zone 2Radon test results from laboratories through 2017
Bennington County73326%2.0Zone 2Radon test results from laboratories through 2017
Caledonia County15337%2.7Zone 2Radon test results from laboratories through 2017
Chittenden County2,71114%1.4Zone 3Radon test results from laboratories through 2017
Essex County1533%2.8Zone 2Radon test results from laboratories through 2017
Franklin County26112%1.3Zone 2Radon test results from laboratories through 2017
Grand Isle County5336%2.6Zone 3Radon test results from laboratories through 2017
Lamoille County76022%2.1Zone 2Radon test results from laboratories through 2017
Orange County46538%2.9Zone 2Radon test results from laboratories through 2017
Orleans County11425%1.8Zone 2Radon test results from laboratories through 2017
Rutland County1,06025%1.9Zone 2Radon test results from laboratories through 2017
Washington County1,35725%2.2Zone 2Radon test results from laboratories through 2017
Windham County1,12718%1.7Zone 2Radon test results from laboratories through 2017
Windsor County1,35826%2.2Zone 2Radon test results from laboratories through 2017

Test your home

County figures show how often tests come back high, not the level in your home. Only a test tells you that: see how to test for radon.

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