In Morgan County, the average radon level is 6.4 picoCuries. Brown, Cass, Greene, Sangamon, Pike, Schuyler and Jersey counties are all over the 4.0 picoCuries level, as well.

(Kits are available at most home centers.) Concentrations exceeding 4 picocuries per liter of air call for immediate remediation. However, the EPA recommends taking measures when radon levels ...

She says the first radon test showed there were 18 picocuries in that person’s apartment. Nixon says 4 picocuries is safe. Radon can get into the house through the cracks in the foundation or ...