The Dalles, OR Radon Mitigation and Testing

Q: What EPA Radon Zone is The Dalles in?

The Dalles is in Wasco County, EPA Zone 2.

Q: How much does radon mitigation cost in The Dalles?

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

Wasco County

EPA Zone 2

Located in Wasco County along the Columbia River Gorge, The Dalles sits on basaltic bedrock from the Columbia River Basalt Group that generally produces lower radon levels. While testing data for the 97058 area isn't extensively documented, the volcanic geology suggests moderate radon risk. Professional radon testing remains advisable for homeowners seeking to establish baseline readings for their properties.

The Dalles, OR Radon Mitigation

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

The Dalles, OR Radon Testing

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

The Dalles Radon Facts

Key details about the radon risk profile for The Dalles and the 97058 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Wasco County, OR

Zip Code

97058

Predicted Screening Level

2–4 pCi/L (Zone 2)

The Dalles and the 97058 zip code are located in Wasco 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 The Dalles, OR

What EPA Radon Zone is The Dalles in?

The Dalles and the 97058 zip code are in Wasco 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 The Dalles?

Radon mitigation in The Dalles 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 The Dalles?

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