Alaska

United States EPA State Map of Radon Gas Concentration

The level of radon gas concentration in Alaska can vary depending on the specific location. However, Alaska has been identified as a state with a high potential for radon gas, because of the geology of the state, as well as the cold climate which can promote the accumulation of radon in buildings. The Alaska Department of Health and Social Services recommends that all residents in Alaska test their homes for radon and take steps to mitigate the gas if levels are found to be high. They also provide information and resources for testing and mitigating radon gas.

The U.S. EPA and the U.S. Geological Survey have evaluated the radon potential in the U.S. and have developed this map is 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 of the 3,141 counties in the U.S. 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)