Nine Mile Falls, WA Radon Mitigation and Testing

Q: What is the average radon level in Nine Mile Falls, WA?

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Nine Mile Falls in?

Nine Mile Falls is in Stevens County, EPA Zone 1.

Q: How much does radon mitigation cost in Nine Mile Falls?

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

Avg: 4.00 pCi/L

Stevens County

EPA Zone 1

1 user test

Nine Mile Falls is located in Stevens County, Washington. With 1 user-submitted readings averaging 4.00 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 99026 zip code.

4.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Nine Mile Falls, WA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Nine Mile Falls, WA Radon Mitigation

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

Nine Mile Falls, WA Radon Testing

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

Nine Mile Falls, Washington Radon Levels

User-submitted radon test readings from homes in the Nine Mile Falls area.

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Nine Mile Falls, WA	21-50 Years	Full Basement	Dec 2022

Have a radon test result for Nine Mile Falls? Submit your reading to help other homeowners.

Nine Mile Falls Radon Facts

Key details about the radon risk profile for Nine Mile Falls and the 99026 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Stevens County, WA

Zip Code

99026

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Nine Mile Falls and the 99026 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 Nine Mile Falls, WA

What is the average radon level in Nine Mile Falls, WA?

Based on 1 user-submitted test, the average radon level in Nine Mile Falls is 4.00 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 Nine Mile Falls in?

Nine Mile Falls and the 99026 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 Nine Mile Falls?

Radon mitigation in Nine Mile Falls 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 Nine Mile Falls?

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