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

Back to Radon Zones in the United States




Radon zones
 Zone 3 (0 counties)
 Zone 2 (35 counties)
 Zone 1 (57 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)
Adams County
Radon zone : 1

Allen County
Radon zone : 1

Bartholomew County
Radon zone : 1

Benton County
Radon zone : 1

Blackford County
Radon zone : 1

Boone County
Radon zone : 1

Brown County
Radon zone : 2

Carroll County
Radon zone : 1

Cass County
Radon zone : 1

Clark County
Radon zone : 1

Clay County
Radon zone : 2

Clinton County
Radon zone : 1

Crawford County
Radon zone : 2

Daviess County
Radon zone : 2

DeKalb County
Radon zone : 1

Dearborn County
Radon zone : 2

Decatur County
Radon zone : 1

Delaware County
Radon zone : 1

Dubois County
Radon zone : 2

Elkhart County
Radon zone : 1

Fayette County
Radon zone : 1

Floyd County
Radon zone : 2

Fountain County
Radon zone : 1

Franklin County
Radon zone : 2

Fulton County
Radon zone : 1

Gibson County
Radon zone : 2

Grant County
Radon zone : 1

Greene County
Radon zone : 2

Hamilton County
Radon zone : 1

Hancock County
Radon zone : 1

Harrison County
Radon zone : 1

Hendricks County
Radon zone : 1

Henry County
Radon zone : 1

Howard County
Radon zone : 1

Huntington County
Radon zone : 1

Jackson County
Radon zone : 2

Jasper County
Radon zone : 2

Jay County
Radon zone : 1

Jefferson County
Radon zone : 2

Jennings County
Radon zone : 1

Johnson County
Radon zone : 1

Knox County
Radon zone : 2

Kosciusko County
Radon zone : 1

LaGrange County
Radon zone : 1

LaPorte County
Radon zone : 2

Lake County
Radon zone : 2

Lawrence County
Radon zone : 1

Madison County
Radon zone : 1

Marion County
Radon zone : 1

Marshall County
Radon zone : 1

Martin County
Radon zone : 2

Miami County
Radon zone : 1

Monroe County
Radon zone : 1

Montgomery County
Radon zone : 1

Morgan County
Radon zone : 2

Newton County
Radon zone : 2

Noble County
Radon zone : 1

Ohio County
Radon zone : 2

Orange County
Radon zone : 1

Owen County
Radon zone : 2

Parke County
Radon zone : 2

Perry County
Radon zone : 2

Pike County
Radon zone : 2

Porter County
Radon zone : 2

Posey County
Radon zone : 2

Pulaski County
Radon zone : 2

Putnam County
Radon zone : 1

Randolph County
Radon zone : 1

Ripley County
Radon zone : 2

Rush County
Radon zone : 1

Scott County
Radon zone : 1

Shelby County
Radon zone : 1

Spencer County
Radon zone : 2

St. Joseph County
Radon zone : 1

Starke County
Radon zone : 2

Steuben County
Radon zone : 1

Sullivan County
Radon zone : 2

Switzerland County
Radon zone : 2

Tippecanoe County
Radon zone : 1

Tipton County
Radon zone : 1

Union County
Radon zone : 1

Vanderburgh County
Radon zone : 2

Vermillion County
Radon zone : 1

Vigo County
Radon zone : 2

Wabash County
Radon zone : 1

Warren County
Radon zone : 1

Warrick County
Radon zone : 2

Washington County
Radon zone : 1

Wayne County
Radon zone : 1

Wells County
Radon zone : 1

White County
Radon zone : 1

Whitley County
Radon zone : 1


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