Quick Facts from the American Lung Asoociation : Radon in Ohio

* Among counties with at least 10 reported tests, the highest average radon concentration was observed in Knox County with an estimated mean radon level of 23.6 pCi/L.

*Among counties with at least 10 reported tests, the lowest mean radon was observed in Meigs County with an estimated mean radon level of 2.8 pCi/L.

*Testing rates per housing unit vary, with the lowest estimated rates in Vinton County (1 per 1k housing units), and the highest estimated rates in Licking County ((66 per 1k housing units).

*The county with the most tests in Franklin County with 16,142 pre mitigation tests and an estimated mean radon level of 9.5 pCi/L.

*Ohio has an estimated 5,232,869 total housing units with 98,840 tests during the study period. Overall, Ohio has an estimated mean radon level of 6.4pCi/L.