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About Radon Levels in Granite County

Local News

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


State Radon Officer

Michael L Gustafson
(800) 546-0483
(406) 444-6592
DEQ Headquarters
1520 E 6th Avenue
Helena MT, 59601