About Radon Levels in Granite County
Local News
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