Astoria, OR Radon Levels

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

Based on 4 user-submitted tests, the average radon level is 9.30 pCi/L.

Q: What EPA Radon Zone is Astoria in?

Astoria is in Clatsop County, EPA Zone 2.

Q: How much does radon mitigation cost in Astoria?

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

Check local Astoria radon levels and find certified testing and mitigation professionals to keep your home safe

Astoria, OR Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Clatsop County, OR

Zip Code 97103

Avg. User Level 9.30 pCi/L

User Tests 4

Perched along the Columbia River in Clatsop County, Astoria's historic homes rest on coastal sedimentary soils and marine terraces that can trap radon gas. Local testing reveals an average radon level of 9.25 pCi/L, which significantly exceeds the EPA action level of 4.0 pCi/L, making mitigation systems essential for many homes in zip code 97103.

9.30

pCi/L average

Above EPA Action Level

Based on 4 user-submitted radon tests for homes in Astoria, OR. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Astoria, OR Radon Mitigation

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Astoria, OR Radon Levels

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

Radon Level	City	Home Age	Foundation
15 pCi/L	Astoria, OR	100+ Years	Full Basement
5 pCi/L	Astoria, OR	100+ Years	Full Basement
12 pCi/L	Astoria, OR	21-50 Years	No Basement/All Slab

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Radon FAQ for Astoria, OR

What is the average radon level in Astoria, OR?

Based on 4 user-submitted tests, the average radon level in Astoria is 9.30 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 Astoria in?

Astoria and the 97103 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 Astoria?

Radon mitigation in Astoria 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 Astoria?

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.

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

Astoria, OR Radon Levels

Check local Astoria radon levels and find certified testing and mitigation professionals to keep your home safe

Astoria, OR Radon Facts

Astoria, OR Radon Mitigation

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Astoria, OR Radon Levels

Radon FAQ for Astoria, OR

Most Active Radon Markets in Oregon

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