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Mazama, WA Radon Levels

Check local Mazama radon levels and find certified testing and mitigation professionals to keep your home safe


Mazama, WA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
County Okanogan County, WA
Zip Code 98833
Avg. User Level 15.00 pCi/L
User Tests 2

Nestled in the North Cascades within Okanogan County, Mazama shows significantly elevated radon levels with an average of 15.0 pCi/L based on limited testing. This reading substantially exceeds the EPA action level, indicating that mitigation systems are strongly recommended for area homes. The mountain community's granite bedrock and glacial soils in zip code 98833 contribute to these elevated radon concentrations.

15.00
pCi/L average
Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Mazama, WA. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Mazama, WA Radon Mitigation

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

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Mazama, WA Radon Levels

User-submitted radon test readings from homes in the Mazama area.

Radon LevelCityHome AgeFoundation
10 pCi/L Mazama, WA 0-20 Years No Basement/All Slab
20 pCi/L Mazama, WA 21-50 Years No Basement/All Crawl Space

Have a radon test result for Mazama? Submit your reading to help other homeowners.

Radon FAQ for Mazama, WA

What is the average radon level in Mazama, WA?
Based on 2 user-submitted tests, the average radon level in Mazama is 15.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
What EPA Radon Zone is Mazama in?
Mazama and the 98833 zip code are in Okanogan 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 Mazama?
Radon mitigation in Mazama 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 Mazama?
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 in Washington with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
Vancouver 6.56 pCi/L 9
Kent 3.50 pCi/L 6
Olympia 7.00 pCi/L 5
Seattle 5.25 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