Rainier, OR Radon Mitigation and Testing

Q: What EPA Radon Zone is Rainier in?

Rainier is in Columbia County, EPA Zone 2.

Q: How much does radon mitigation cost in Rainier?

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

Columbia County

EPA Zone 2

This Columbia County community along the Columbia River sits within the Portland Metro area, where volcanic soils and Columbia River basalt formations typically produce lower radon readings. Testing data for zip code 97048 remains limited, though Oregon's generally moderate radon risk still warrants homeowner testing. The area's mix of riverfront homes and hillside properties on different geological substrates can produce varying radon levels.

Rainier, OR Radon Mitigation

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

Rainier, OR Radon Testing

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

Rainier Radon Facts

Key details about the radon risk profile for Rainier and the 97048 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Columbia County, OR

Zip Code

97048

Predicted Screening Level

2–4 pCi/L (Zone 2)

Rainier and the 97048 zip code are located in Columbia 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 Rainier, OR

What EPA Radon Zone is Rainier in?

Rainier and the 97048 zip code are in Columbia 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 Rainier?

Radon mitigation in Rainier 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 Rainier?

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