Lake Oswego, OR Radon Mitigation and Testing

Q: What EPA Radon Zone is Lake Oswego in?

Lake Oswego is in Clackamas County, EPA Zone 3.

Q: How much does radon mitigation cost in Lake Oswego?

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

Clackamas County

EPA Zone 3

Situated in Clackamas County within the Portland Metro area, Lake Oswego sits in Oregon's Willamette Valley where volcanic soils and basalt bedrock typically produce lower radon levels than many other regions. Testing data for zip codes 97034 and 97035 remains limited, though EPA Zone 3 classification suggests moderate concern. The community's upscale residential character features predominantly newer homes with modern foundation systems that may reduce radon entry compared to older construction.

Lake Oswego, OR Radon Mitigation

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

Lake Oswego, OR Radon Testing

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

Lake Oswego Radon Facts

Key details about the radon risk profile for Lake Oswego and the 97034 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Clackamas County, OR

Zip Code

97034

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Lake Oswego and the 97034 zip code are located in Clackamas County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Lake Oswego, OR

What EPA Radon Zone is Lake Oswego in?

Lake Oswego and the 97034 zip code are in Clackamas County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Lake Oswego?

Radon mitigation in Lake Oswego 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 Lake Oswego?

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