Davenport, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Davenport in?

Davenport is in Lincoln County, EPA Zone 2.

Q: How much does radon mitigation cost in Davenport?

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

Lincoln County

EPA Zone 2

Positioned in Lincoln County within the Spokane Metro area, Davenport sits on the Columbia Plateau where basalt flows and glacial deposits create variable radon conditions. The town's location in EPA Zone 2 indicates moderate radon potential, though individual homes can still exceed action levels. With limited local testing data available for zip code 99122, residents should conduct radon testing to determine their specific exposure risk.

Davenport, WA Radon Mitigation

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

Davenport, WA Radon Testing

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

Davenport Radon Facts

Key details about the radon risk profile for Davenport and the 99122 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Lincoln County, WA

Zip Code

99122

Predicted Screening Level

2–4 pCi/L (Zone 2)

Davenport and the 99122 zip code are located in Lincoln 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 Davenport, WA

What EPA Radon Zone is Davenport in?

Davenport and the 99122 zip code are in Lincoln 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 Davenport?

Radon mitigation in Davenport 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 Davenport?

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