Is radon common in Oregon and southwest Washington?
High radon concentrations have been found in every neighborhood. However, homes in some areas have a much greater risk of having high radon levels. North and northeast Portland, Clark County Washington and west Salem, for example, are areas where nearly 50% of the homes tested have indoor radon concentrations exceed EPA’s recommended action level of 4 picocuries per liter of air (pCi/L). The only way to know if you are being exposed to dangerous radon concentrations at home is to test your house.
