Loon Lake, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Loon Lake in?

Loon Lake is in Stevens County, EPA Zone 1.

Q: How much does radon mitigation cost in Loon Lake?

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

Stevens County

EPA Zone 1

Positioned in Stevens County within the greater Spokane Metro area, Loon Lake in zip code 99148 sits amid glacial lake deposits and granite bedrock typical of Washington's inland northwest. With limited radon testing data currently available for this lakeside community, homeowners should consider independent testing to understand their specific exposure levels. The area's recreational housing mix and varied foundation types can influence how radon accumulates in different properties.

Loon Lake, WA Radon Mitigation

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

Loon Lake, WA Radon Testing

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

Loon Lake Radon Facts

Key details about the radon risk profile for Loon Lake and the 99148 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Stevens County, WA

Zip Code

99148

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Loon Lake and the 99148 zip code are located in Stevens County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Loon Lake, WA

What EPA Radon Zone is Loon Lake in?

Loon Lake and the 99148 zip code are in Stevens County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Loon Lake?

Radon mitigation in Loon Lake 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 Loon Lake?

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