EPA Zone Data 2026
IN Radon Levels
View EPA radon zone classifications for every county in IN. Select your county to see detailed risk data, testing recommendations, and mitigation cost estimates.
57
Zone 1
High Risk
High Risk
35
Zone 2
Moderate
Moderate
0
Zone 3
Low Risk
Low Risk
Adams
Zone 1
Allen
Zone 1
Bartholomew
Zone 1
Benton
Zone 1
Blackford
Zone 1
Boone
Zone 1
Brown
Zone 2
Carroll
Zone 1
Cass
Zone 1
Clark
Zone 1
Clay
Zone 2
Clinton
Zone 1
Crawford
Zone 2
Daviess
Zone 2
DeKalb
Zone 1
Dearborn
Zone 2
Decatur
Zone 1
Delaware
Zone 1
Dubois
Zone 2
Elkhart
Zone 1
Fayette
Zone 1
Floyd
Zone 2
Fountain
Zone 1
Franklin
Zone 2
Fulton
Zone 1
Gibson
Zone 2
Grant
Zone 1
Greene
Zone 2
Hamilton
Zone 1
Hancock
Zone 1
Harrison
Zone 1
Hendricks
Zone 1
Henry
Zone 1
Howard
Zone 1
Huntington
Zone 1
Jackson
Zone 2
Jasper
Zone 2
Jay
Zone 1
Jefferson
Zone 2
Jennings
Zone 1
Johnson
Zone 1
Knox
Zone 2
Kosciusko
Zone 1
LaGrange
Zone 1
LaPorte
Zone 2
Lake
Zone 2
Lawrence
Zone 1
Madison
Zone 1
Marion
Zone 1
Marshall
Zone 1
Martin
Zone 2
Miami
Zone 1
Monroe
Zone 1
Montgomery
Zone 1
Morgan
Zone 2
Newton
Zone 2
Noble
Zone 1
Ohio
Zone 2
Orange
Zone 1
Owen
Zone 2
Parke
Zone 2
Perry
Zone 2
Pike
Zone 2
Porter
Zone 2
Posey
Zone 2
Pulaski
Zone 2
Putnam
Zone 1
Randolph
Zone 1
Ripley
Zone 2
Rush
Zone 1
Scott
Zone 1
Shelby
Zone 1
Spencer
Zone 2
St. Joseph
Zone 1
Starke
Zone 2
Steuben
Zone 1
Sullivan
Zone 2
Switzerland
Zone 2
Tippecanoe
Zone 1
Tipton
Zone 1
Union
Zone 1
Vanderburgh
Zone 2
Vermillion
Zone 1
Vigo
Zone 2
Wabash
Zone 1
Warren
Zone 1
Warrick
Zone 2
Washington
Zone 1
Wayne
Zone 1
Wells
Zone 1
White
Zone 1
Whitley
Zone 1
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