Astoria, OR Radon Mitigation and Testing

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.

Avg: 9.30 pCi/L

Clatsop County

EPA Zone 2

4 user tests

Astoria is located in Clatsop County, Oregon. With 4 user-submitted readings averaging 9.30 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 97103 zip code.

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

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

Astoria, OR Radon Testing

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

Astoria, Oregon Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
15 pCi/L	Astoria, OR	100+ Years	Full Basement	Dec 2022
5 pCi/L	Astoria, OR	100+ Years	Full Basement	Oct 2022
12 pCi/L	Astoria, OR	21-50 Years	No Basement/All Slab	Jun 2018

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

Astoria Radon Facts

Key details about the radon risk profile for Astoria and the 97103 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Clatsop County, OR

Zip Code

97103

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

9.30 pCi/L

User Tests Submitted

Astoria and the 97103 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 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 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