A Geologically Based Indoor-Radon Potential Map of Kentucky.

We combined 71,930 short-term (median duration 4 days) home radon test results with 1:24,000-scale bedrock geologic map coverage of Kentucky to produce a statewide geologically based indoor-radon potential map. The test results were positively skewed with a mean of 266 Bq/m, median of 122 Bq/m, and 75th percentile of 289 Bq/m. We identified 106 formations with ≥10 test results.