Seaside, OR Radon Mitigation and Testing

Q: What EPA Radon Zone is Seaside in?

Seaside is in Clatsop County, EPA Zone 2.

Q: How much does radon mitigation cost in Seaside?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Clatsop County

EPA Zone 2

Oregon's historic coastal resort town Seaside sits in Clatsop County where Pacific Ocean proximity and marine terraces create favorable conditions for low radon levels. While testing data for zip code 97138 remains limited, the area's coastal geology typically minimizes radon gas accumulation. Homeowners should still establish baseline measurements, as individual building characteristics can influence indoor radon concentrations even in low-risk geological areas.

Seaside, OR Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Seaside, OR Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Seaside Radon Facts

Key details about the radon risk profile for Seaside and the 97138 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Clatsop County, OR

Zip Code

97138

Predicted Screening Level

2–4 pCi/L (Zone 2)

Seaside and the 97138 zip code are located in Clatsop County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Seaside, OR

What EPA Radon Zone is Seaside in?

Seaside and the 97138 zip code are in Clatsop 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 Seaside?

Radon mitigation in Seaside 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 Seaside?

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 with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Corvallis	5.60 pCi/L	5
Astoria	9.25 pCi/L	4
La Grande	10.67 pCi/L	3
Bend	3.33 pCi/L	3
Salem	9.00 pCi/L	2
Eugene	7.00 pCi/L	2
Medford	7.00 pCi/L	1
Dundee	6.00 pCi/L	1
Ashland	4.00 pCi/L	1
Portland	4.00 pCi/L	1
Lincoln City	No submissions	0
West Linn	No submissions	0