Gresham, OR Radon Levels
Check local Gresham radon levels and find certified testing and mitigation professionals to keep your home safe
Gresham, OR Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
Multnomah County, OR
Zip Code
97030
Located in eastern Multnomah County within the Portland metro area, Gresham's Columbia River Gorge geology typically produces moderate radon levels due to volcanic basalt formations. With limited testing data available for zip codes 97030 and 97080, residents should consider radon testing to establish baseline levels. Though classified as EPA Zone 2, individual homes can still experience elevated radon depending on specific geological and construction factors.
Gresham, OR Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Gresham?
- 100% Free, No-Obligation Quotes
- Matches You with State-Licensed Multnomah County Pros
Radon FAQ for Gresham, OR
What EPA Radon Zone is Gresham in?
Gresham and the 97030 zip code are in Multnomah 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 Gresham?
Radon mitigation in Gresham 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 Gresham?
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.
Most Active Radon Markets in Oregon
Cities in Oregon with the most user-submitted radon test data, ranked by number of submissions.