State Overview
IL
Select your county below to view itemized mitigation estimates, local labor rates, and EPA zone risk factors.
Adams
Alexander
Bond
Boone
Brown
Bureau
Calhoun
Carroll
Cass
Champaign
Christian
Clark
Clay
Clinton
Coles
Cook
Crawford
Cumberland
De Witt
DeKalb
Douglas
DuPage
Edgar
Edwards
Effingham
Fayette
Ford
Franklin
Fulton
Gallatin
Greene
Grundy
Hamilton
Hancock
Hardin
Henderson
Henry
Iroquois
Jackson
Jasper
Jefferson
Jersey
Jo Daviess
Johnson
Kane
Kankakee
Kendall
Knox
LaSalle
Lake
Lawrence
Lee
Livingston
Logan
Macon
Macoupin
Madison
Marion
Marshall
Mason
Massac
McDonough
McHenry
McLean
Menard
Mercer
Monroe
Montgomery
Morgan
Moultrie
Ogle
Peoria
Perry
Piatt
Pike
Pope
Pulaski
Putnam
Randolph
Richland
Rock Island
Saline
Sangamon
Schuyler
Scott
Shelby
St. Clair
Stark
Stephenson
Tazewell
Union
Vermilion
Wabash
Warren
Washington
Wayne
White
Whiteside
Will
Williamson
Winnebago
Woodford
IL Radon Levels by County
View EPA zone data and risk classifications
How to Test for Radon
Complete homeowner's testing guide
Why Does Cost Vary in IL?
Cost estimates across IL range due to local labor market conditions and specific EPA zone profiles. Foundation types (basement vs slab) also heavily impact material costs and permit requirements. Choose your specific county to narrow down your estimate bounds.