Radon by ZIP

Radon zones in Vermont

Last updated

EPA’s Map of Radon Zones places 14 Vermont counties in its three radon potential zones: 0 in Zone 1 (highest), 12 in Zone 2 (moderate), and 2 in Zone 3 (low).

0Zone 1 · Highest potential
12Zone 2 · Moderate potential
2Zone 3 · Low potential

What this means for Vermont homes

Most Vermont counties fall in Zone 2. EPA predicts moderate average indoor levels (2 to 4 pCi/L) across much of Vermont. Many homes will be below the action level, but many will not, and only a test can tell which.

EPA’s guidance is the same everywhere: test your home, fix it if the level is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L. The zone map is from 1993 and should not be used to decide whether a single home needs testing.

Vermont radon program

EPA lists the following state contact for Vermont: VT Radon Program, phone 802-863-7220. Website: healthvermont.gov/radon. State programs can tell you about local testing data, free or discounted test kits, disclosure rules for home sales, and credentialed radon professionals.

Vermont counties and their EPA radon zones

CountyEPA radon zone
Addison CountyZone 2
Bennington CountyZone 2
Caledonia CountyZone 2
Chittenden CountyZone 3
Essex CountyZone 2
Franklin CountyZone 2
Grand Isle CountyZone 3
Lamoille CountyZone 2
Orange CountyZone 2
Orleans CountyZone 2
Rutland CountyZone 2
Washington CountyZone 2
Windham CountyZone 2
Windsor CountyZone 2

County names follow the 2020 Census. Zones from the EPA Map of Radon Zones (text version). Rows marked “zone of” use the zone EPA gave the predecessor or surrounding county.

Next steps: read how to test your home, check a result with the level calculator, or look up a single address by ZIP code.

Sources

  1. U.S. EPA, EPA Map of Radon Zones (text version)
  2. U.S. EPA, EPA Map of Radon Zones and Supplemental Information (state radon contacts)
  3. U.S. EPA, EPA Maps of Radon Zones and Supporting Documents by State