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Map of Radon Zones in Oregon based on Environmental Protection Agency (EPA) data

Back to Radon Zones in the United States




Radon zones
 Zone 3 (15 counties)
 Zone 2 (21 counties)
 Zone 1 (0 counties)
  Highest Potential: counties have a predicted average indoor radon screening level greater than 4 pCi/L (pico curies per liter) (red zones)
  Moderate Potential: counties have a predicted average indoor radon screening level between 2 and 4 pCi/L (orange zones)
  Low Potential: counties have a predicted average indoor radon screening level less than 2 pCi/L (yellow zones)
Baker County
Radon zone : 2

Benton County
Radon zone : 3

Clackamas County
Radon zone : 3

Clatsop County
Radon zone : 2

Columbia County
Radon zone : 2

Coos County
Radon zone : 3

Crook County
Radon zone : 2

Curry County
Radon zone : 3

Deschutes County
Radon zone : 3

Douglas County
Radon zone : 3

Gilliam County
Radon zone : 2

Grant County
Radon zone : 2

Harney County
Radon zone : 2

Hood River County
Radon zone : 2

Jackson County
Radon zone : 3

Jefferson County
Radon zone : 2

Josephine County
Radon zone : 3

Klamath County
Radon zone : 2

Lake County
Radon zone : 2

Lane County
Radon zone : 3

Lincoln County
Radon zone : 3

Linn County
Radon zone : 3

Malheur County
Radon zone : 2

Marion County
Radon zone : 3

Morrow County
Radon zone : 2

Multnomah County
Radon zone : 2

Polk County
Radon zone : 3

Sherman County
Radon zone : 2

Tillamook County
Radon zone : 3

Umatilla County
Radon zone : 2

Union County
Radon zone : 2

Wallowa County
Radon zone : 3

Wasco County
Radon zone : 2

Washington County
Radon zone : 2

Wheeler County
Radon zone : 2

Yamhill County
Radon zone : 2


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