Radon Levels in Oregon
Oregon is classified as an EPA Zone 2 state with a moderate risk for radon. Average indoor radon levels range from 1 to 4 pCi/L, and approximately 13% of Oregon homes test above the EPA action level of 4.0 pCi/L.
Oregon Radon Summary
Key Facts About Radon in Oregon
- Eastern Oregon has higher radon levels than the coast
- Oregon's volcanic geology creates variable radon levels across the state
- Oregon Radon Program within OHA provides resources
Oregon Testing Requirements & Recommendations
Oregon recommends testing all homes. No statewide mandate.
Oregon radon contractors must be certified through the National Radon Proficiency Program (NRPP).
Major Cities in Oregon
Radon levels can vary significantly within Oregon depending on local geology. All residents — regardless of city — should test their specific home, as neighborhood-level radon varies independently of broader state and county averages.
What Should Oregon Residents Do?
Test Your Home
Use a short-term charcoal test kit ($15–$25) for an initial reading, or a continuous radon detector for ongoing monitoring. Test in your basement or lowest livable area.
Understand Your Result
If your result is below 2.0 pCi/L: monitor periodically. Between 2.0–4.0 pCi/L: consider mitigation. Above 4.0 pCi/L: the EPA recommends mitigation. Above 8.0 pCi/L: take action promptly.
Hire a Certified Contractor if Needed
Look for NRPP or NRSB-certified radon mitigation contractors in Oregon. Mitigation systems typically cost $800–$2,500 and can reduce radon levels by 50–99%.
Verify with a Follow-Up Test
After mitigation, test again to confirm the system is working. Retest every 2 years, or after significant home renovations.
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