Cathlamet, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Cathlamet in?

Cathlamet is in Wahkiakum County, EPA Zone 3.

Q: How much does radon mitigation cost in Cathlamet?

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

Wahkiakum County

EPA Zone 3

Located along the Columbia River in Wahkiakum County, Cathlamet's riverside position on volcanic and sedimentary geology typically yields moderate radon potential. The town's housing stock includes historic homes from the logging era alongside newer river-view properties, many with crawl space foundations due to flood considerations. Testing data for this 98612 zip code area is currently sparse, making individual home testing particularly important for residents.

Cathlamet, WA Radon Mitigation

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

Cathlamet, WA Radon Testing

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

Cathlamet Radon Facts

Key details about the radon risk profile for Cathlamet and the 98612 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Wahkiakum County, WA

Zip Code

98612

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Cathlamet and the 98612 zip code are located in Wahkiakum 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 Cathlamet, WA

What EPA Radon Zone is Cathlamet in?

Cathlamet and the 98612 zip code are in Wahkiakum 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 Cathlamet?

Radon mitigation in Cathlamet 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 Cathlamet?

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 Washington

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Vancouver	6.56 pCi/L	9
Kent	3.60 pCi/L	5
Seattle	5.25 pCi/L	4
Olympia	5.00 pCi/L	4
Bellevue	3.75 pCi/L	4
Spokane	11.67 pCi/L	3
Camas	8.00 pCi/L	3
Centralia	7.00 pCi/L	3
Bellingham	4.50 pCi/L	2
Kirkland	4.50 pCi/L	2
Washougal	8.00 pCi/L	1
Ridgefield	5.00 pCi/L	1
Moses Lake	No submissions	0