Wisconsin Radon Levels

Zone 1 counties have predicted average indoor radon screening level greater than 4 pCi/L (picocuries per liter) (red zones)
Highest Potential
Zone 2 counties have predicted average indoor radon screening level between 2 and 4 pCi/L (picocuries per liter) (orange zones)
Moderate Potential
Zone 3 counties have predicted average indoor radon screening level less than 2 pCi/L (picocuries per liter) (yellow zones)
Low Potential

Radon is naturally occuring radioactive gas that is colorless, odorless, and tasteless. It is formed by natural breakdown of uranium in rock, soil, and water

Radon gas moves up through the soil and can be drawn into our homes by slight pressure differences. Once inside, radon can become trapped and build up to unsafe levels

State Breakdown

Rankings are based off the average zone rating for all counties in the state. Rankings are from the highest potential risk to the lowest potential risk.
1.) Iowa Radon
1.00
2.) North Dakota Radon
1.00
3.) Wyoming Radon
1.05
4.) Montana Radon
1.08
5.) Maine Radon
1.13
6.) Colorado Radon
1.16
7.) Pennsylvania Radon
1.30
8.) Kansas Radon
1.36
9.) Indiana Radon
1.38
10.) Ohio Radon
1.39
11.) Minnesota Radon
1.39
12.) Illinois Radon
1.42
13.) South Dakota Radon
1.43
14.) Idaho Radon
1.47
15.) Rhode Island Radon
1.54
16.) Wisconsin Radon
1.64
17.) Massachusetts Radon
1.65
18.) Nevada Radon
1.66
19.) New York Radon
1.68
20.) Connecticut Radon
1.68
21.) Virginia Radon
1.70
22.) New Mexico Radon
1.78
23.) West Virginia Radon
1.78
24.) Utah Radon
1.79
25.) Kentucky Radon
1.80
26.) New Jersey Radon
1.82
27.) Nebraska Radon
1.89
28.) New Hampshire Radon
1.90
29.) Tennessee Radon
1.92
30.) Maryland Radon
1.94
31.) Missouri Radon
1.97
32.) Arizona Radon
2.00
33.) Vermont Radon
2.07
34.) Alabama Radon
2.10
35.) Washington Radon
2.15
36.) Oregon Radon
2.34
37.) California Radon
2.35
38.) Michigan Radon
2.40
39.) North Carolina Radon
2.59
40.) Georgia Radon
2.65
41.) Delaware Radon
2.78
42.) Texas Radon
2.78
43.) South Carolina Radon
2.78
44.) Florida Radon
2.82
45.) Arkansas Radon
2.82
46.) Oklahoma Radon
2.85
47.) Alaska Radon
2.87
48.) Mississippi Radon
2.89
49.) Hawaii Radon
3.00
50.) Louisiana Radon
3.00
51.) Washington Dc Radon
3.00