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Oregon Health Authority Updated Its Radon Risk Map

by Margaret Henderson

in January 2019

The Oregon Health Authority, Radon Awareness Program, has updated the Radon Risk Map as of January 2019. Maintaining data in tabular and map format, the Program presents radon risk levels in zip code areas. Risk levels assigned are Low, Moderate and High. These levels are assigned based on maximum test results, average test results and the percent of locations with values in excess of 4 pCi/L, the EPA recommended action level. The indoor radon test results were provided to the Program voluntarily by test kits manufacturers.

The risk categories are provided to give guidance to the public about potential risk, but are not intended to predict what radon levels may be present in any area of the state.

The Program advises that testing is the only way to know what levels are present. Higher levels of radon have been found in northwest Oregon, including the Columbia Gorge and Willamette River Valley. However, test results indicate high levels in other areas as well.

Links to the data are:

Table https://www.oregon.gov/oha/PH/HEALTHYENVIRONMENTS/HEALTHYNEIGHBORHOODS/RADONGAS/Documents/Oregon%20Radon%20Risk%20Level%20SummaryTable.pdf

Radon Risk Map - Updated January 2019 https://geo.maps.arcgis.com/apps/Styler/index.html?appid=b48af2492fac4dd7857e5601c54dbf0f

For more information, contact:

Oregon Radon Awareness Program
E-mail: radon.program@state.or.us
Telephone: 971-673-0440