Grass Valley, OR Radon Mitigation and Testing

Q: What EPA Radon Zone is Grass Valley in?

Grass Valley is in Sherman County, EPA Zone 2.

Q: How much does radon mitigation cost in Grass Valley?

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

Sherman County

EPA Zone 2

This rural community in Sherman County sits in Oregon's wheat country along the Columbia River plateau in zip code 97029. Built on Columbia River basalt flows and wind-deposited loess soils, the area features widely scattered farms and ranch properties with typically simple foundation systems including crawl spaces and slab construction. Radon testing data is currently unavailable, making individual home testing important for understanding local radon conditions.

Grass Valley, OR Radon Mitigation

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

Grass Valley, OR Radon Testing

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

Grass Valley Radon Facts

Key details about the radon risk profile for Grass Valley and the 97029 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Sherman County, OR

Zip Code

97029

Predicted Screening Level

2–4 pCi/L (Zone 2)

Grass Valley and the 97029 zip code are located in Sherman 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 Grass Valley, OR

What EPA Radon Zone is Grass Valley in?

Grass Valley and the 97029 zip code are in Sherman 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 Grass Valley?

Radon mitigation in Grass Valley 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 Grass Valley?

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