Mazama, WA Radon Mitigation and Testing

Q: What is the average radon level in Mazama, WA?

Based on 2 user-submitted tests, the average radon level is 15.00 pCi/L.

Q: What EPA Radon Zone is Mazama in?

Mazama is in Okanogan County, EPA Zone 1.

Q: How much does radon mitigation cost in Mazama?

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

Avg: 15.00 pCi/L

Okanogan County

EPA Zone 1

2 user tests

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.

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.

Mazama, WA Radon Testing

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

Mazama, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
10 pCi/L	Mazama, WA	0-20 Years	No Basement/All Slab	Dec 2023
20 pCi/L	Mazama, WA	21-50 Years	No Basement/All Crawl Space	Jun 2019

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

Mazama Radon Facts

Key details about the radon risk profile for Mazama and the 98833 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Okanogan County, WA

Zip Code

98833

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

15.00 pCi/L

User Tests Submitted

Mazama and the 98833 zip code are located in Okanogan 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 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 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