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About Radon Levels in San Francisco County

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

The average indoor radon levels of San Francisco County, as determined by radon test results from Air Chek, is 0.5 pCi/L

Local News

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


State Radon Officer

Natalia Deardorff
(800) 745-7236
(916) 716-3679
Radon Program(Indoor Radon)
PO Box 997377
Sacramento CA, 95899