Find Radon Testers in Johns Island, Pennsylvania
1 certified radon professional found near Johns Island.
Radon Risk Level
EPA data for Johns Island area
Average indoor level8.6 pCi/L
0EPA action level: 4 pCi/L10+
Very high radon state — highest measured levels in the US. All homes should be tested.
72% of homesin this state test above the EPA action level (4 pCi/L).
The EPA recommends all homes in high-radon states be tested regardless of construction type.