Find Radon Testers in Johnston, Rhode Island
3 certified radon professionals found near Johnston.
Radon Risk Level
EPA data for Johnston area
Average indoor level3.5 pCi/L
0EPA action level: 4 pCi/L10+
Moderate-to-high potential; granite geology contributes.
22% of homesin this state test above the EPA action level (4 pCi/L).
