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Oregon Health Authority Updates Radon Risk Map in January 2020

by Margaret Henderson

The Oregon Health Authority has updated its Radon Risk Map as of January 2020. Much of Oregon is show “at risk.” Risk level methodology is explained at https://www.oregon.gov/oha/PH/HEALTHYENVIRONMENTS/HEALTHYNEIGHBORHOODS/RADONGAS/Documents/Radon%20Risk%20Level%20Assignment.pdf

Risk levels are defined as “Low, Moderate and High,” within each zip code area based on considering three factors:

· the maximum observed test result value;

· the average test result value; and

· the percent of locations with a test result that was greater than or equal to 4 picocuries per liter (piC/L) within the zip code.

This map summarizes test results of indoor air for radon that test kit manufacturers have voluntarily provided to OHA's Radon Awareness Program.

See the updated map at https://geo.maps.arcgis.com/apps/Styler/index.html?appid=b48af2492fac4dd7857e5601c54dbf0f