Hillsboro, OR Radon Levels
Check local Hillsboro radon levels and find certified testing and mitigation professionals to keep your home safe
Hillsboro, OR Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
Washington County, OR
Zip Code
97123
Located in Washington County within the Portland Metro area, Hillsboro sits on the volcanic soils of the Tualatin Valley. Based on limited testing data from zip code 97123, the city shows an average radon level of 3.0 pCi/L, which falls within EPA's recommended range but still warrants testing for individual properties.
Hillsboro, OR Radon Mitigation
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Hillsboro, OR Radon Levels
User-submitted radon test readings from homes in the Hillsboro area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 3 pCi/L | Hillsboro, OR | 0-20 Years | No Basement/All Crawl Space |
Have a radon test result for Hillsboro? Submit your reading to help other homeowners.
Radon FAQ for Hillsboro, OR
What EPA Radon Zone is Hillsboro in?
Hillsboro and the 97123 zip code are in Washington County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
How much does radon mitigation cost in Hillsboro?
Radon mitigation in Hillsboro typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Hillsboro?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.
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