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About Radon Levels in Hillsborough County

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

The average indoor radon levels of Hillsborough County, as determined by radon test results from Air Chek, is 5.1 pCi/L

Local News

Radon Risk Chart for Hillsborough 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 Hillsborough County may be available through this website.


State Radon Officer

Owen David
(603) 271-4052
NH DHHS
29 Hazen Dr
Concord NH, 3302