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Radon zones in Vermont

The EPA assigns every county in Vermont to one of three radon potential zones. No county in Vermont is in Zone 1. That is a statement about predicted county averages, not about any individual home - homes above the action level are found in all three zones.

14
Counties
0
Zone 1 counties
Predicted average above 4 pCi/L
12
Zone 2 counties
Predicted average 2-4 pCi/L
2
Zone 3 counties
Predicted average below 2 pCi/L

The map

Radon potential across Vermont

Every county in Vermont, filled by the zone the EPA assigns it. Zones follow geology rather than county lines, so the colour usually changes where the bedrock does, not where the border is.

Zone 1 · 0Zone 2 · 12Zone 3 · 2

Hover a county · click to open it

County by county

All 14 Vermont counties

Zone 1 · > 4 pCi/LZone 2 · 2 - 4 pCi/LZone 3 · < 2 pCi/L
CountyZonePopulationCOPDSmokingLung ca. deaths
Addison County238k6.0%9.9%25.7
Bennington County237k7.3%11.9%36.6
Caledonia County231k7.8%13.7%32.8
Essex County26,01010.4%16.3%30.8
Franklin County251k7.2%13.0%40.3
Lamoille County226k6.2%11.9%36.1
Orange County230k7.1%12.1%30.8
Orleans County228k8.3%13.9%32.3
Rutland County260k7.9%12.9%35.0
Washington County260k6.3%11.5%33.6
Windham County246k7.5%12.2%28.1
Windsor County258k6.7%11.1%28.7
Chittenden County3169k4.9%8.5%29.5
Grand Isle County37,4676.6%11.3% -

Zones from the EPA Map of Radon Zones. COPD and smoking are CDC PLACES model-based estimates of adult prevalence. Lung cancer death rates are age-adjusted deaths per 100,000 per year, 2019-2023, from NCI State Cancer Profiles. A dash means the source does not report a value for that county.

Other states

Radon zones elsewhere