|EPA Map of Radon Zones
|The U.S. EPA and the U.S. Geological Survey have evaluated the radon potential in the U.S. and have developed maps to assist
National, State, and local organizations to target their resources and to assist building code officials in deciding whether
radon-resistant features are applicable in new construction.
This map is not intended to be used to determine if a home in a given zone should be tested
for radon. Homes with elevated levels of radon have been found in all three zones. All
homes should be tested regardless of geographic location.
The map assigns each county in Michigan to one of three zones based on radon potential. Each zone designation reflects the
average short-term radon measurement that can be expected to be measured in a building without the implementation of radon
control methods. The radon zone designation of the highest priority is Zone 1.
Zone 1 Highest Potential (greater than 4 pCi/L)
Zone 2 Moderate Potential (from 2 to 4 pCi/L)
Zone 3 Low Potential (less than 2 pCi/L)