Corvallis, OR Radon Mitigation and Testing

Q: What is the average radon level in Corvallis, OR?

Based on 5 user-submitted tests, the average radon level is 5.60 pCi/L.

Q: What EPA Radon Zone is Corvallis in?

Corvallis is in Benton County, EPA Zone 3.

Q: How much does radon mitigation cost in Corvallis?

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

Avg: 5.60 pCi/L

Benton County

EPA Zone 3

5 user tests

Positioned in Benton County within Oregon's Willamette Valley, Corvallis shows an average radon level of 5.6 pCi/L that exceeds the EPA action threshold based on available data. The university town sits atop alluvial deposits and marine sedimentary rocks that contribute to moderate radon potential in the region. Homeowners across zip codes 97330, 97331, and 97333 should consider radon mitigation systems, particularly in homes with basements or crawl spaces where radon can accumulate.

5.60

pCi/L average

Above EPA Action Level

Based on 5 user-submitted radon tests for homes in Corvallis, OR. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Corvallis, OR Radon Mitigation

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

Corvallis, OR Radon Testing

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

Corvallis, Oregon Radon Levels

User-submitted radon test readings from homes in the Corvallis area.

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Corvallis, OR	21-50 Years	Partial Basement	Sep 2025
9 pCi/L	Corvallis, OR	21-50 Years	No Basement/All Crawl Space	Dec 2021
6 pCi/L	Corvallis, OR	21-50 Years	Full Basement	Nov 2021
2 pCi/L	Corvallis, OR	21-50 Years	Full Basement	Jun 2019
8 pCi/L	Corvallis, OR	21-50 Years	Partial Basement	Mar 2016

Have a radon test result for Corvallis? Submit your reading to help other homeowners.

Corvallis Radon Facts

Key details about the radon risk profile for Corvallis and the 97330 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Benton County, OR

Zip Code

97330

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

5.60 pCi/L

User Tests Submitted

Corvallis and the 97330 zip code are located in Benton 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 Corvallis, OR

What is the average radon level in Corvallis, OR?

Based on 5 user-submitted tests, the average radon level in Corvallis is 5.60 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Corvallis in?

Corvallis and the 97330 zip code are in Benton 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 Corvallis?

Radon mitigation in Corvallis 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 Corvallis?

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