Radon, a naturally occurring radioactive gas,\\u00a0is the second leading cause of lung cancer after tobacco smoke and the leading cause of lung cancer in nonsmokers in the United States. Radon is an under-recognized health concern in Alaska. This online map serves as a guide to where radon may occur; however,\\u00a0indoor radon concentrations can vary greatly from building to building.\\u00a0The only way to know if your home contains radon is to test.\\u00a0More\\u00a0information is available at\\u00a0http://dggs.alaska.gov/hazards/radon.html.
The State of Alaska, Division of Geological & Geophysical Surveys is growing an Alaska Radon Database that contains radon test results from buildings located in communities all over the State. This map contains four layers of hexagons displaying test-result statistics at the scales of 1,024, 256, 64, and 16 square kilometers. These layers display in turn as you zoom into the map. Hexagons are colored based on the average (mean) of the indoor-air radon test results that are located in each hexagon. Where multiple test results are available at an individual test location (building), the maximum value is used. As of September 30, 2019, test results were available for 1,737 individual buildings statewide. Hexagons containing fewer than 10 results are labelled with \\u201cLC\\u201d, meaning \\u201cLow Count\\u201d. Hexagons may be selected to show additional statistics.
The map also contains a radon-potential layer modeled from available test results and three statewide datasets, uranium in soils and sediments, depth to water table (and permafrost), and geology. More information about this layer will be available in forthcoming metadata. This map should not be used to determine whether to test your home. No matter where you live, test your home for radon. Buildings located in any radon-potential zone may concentrate radon gas, leading to significant levels of indoor radon at that site.
This web map is included in the following\\u00a0web app:\\u00a0https://geoportal.dggs.dnr.alaska.gov/portal/home/item.html?id=8ed4e400e2d9460c8cf959deb91ee22b
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