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About Radon Levels in Johnson County

The average national indoor radon level is 1.3 pCi/L. (FAQ: What is a picocurie?)

The average indoor radon levels of Johnson County, as determined by radon test results from Air Chek, is 5.5 pCi/L

Local News

Radon Risk Chart for Johnson County


    Results under 2 pCi/L

    Results between 2 and 3.9 pCi/L

    Results 4 pCi/L and above


Check Your Own Radon Levels!


Additional information about radon levels in Johnson County may be available through this website.


State Radon Officer

Mark Ungerer
(800) 693-5343
(785) 296-1568
Kansas Department of Health and Environment
1000 SW Jackson St. Suite 310
Topeka KS, 66612-1366

Radon Resources