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Montesano, WA Radon Levels

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


Montesano, WA Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
County Grays Harbor County, WA
Zip Code 98563
Avg. User Level 17.00 pCi/L
User Tests 1

Montesano in Grays Harbor County shows concerning radon levels, with local testing revealing an average of 17.0 pCi/L — significantly above the EPA's 4.0 pCi/L action threshold. This Pacific Northwest logging community's homes, built on glacial and alluvial soils, demonstrate the importance of radon testing even in areas not traditionally associated with high radon risk. Residents in zip code 98563 should prioritize testing and mitigation if elevated levels are found.

17.00
pCi/L average
Above EPA Action Level

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

0
4.0 EPA
10+

Montesano, WA Radon Mitigation

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

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Montesano, WA Radon Levels

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

Radon LevelCityHome AgeFoundation
17 pCi/L Montesano, WA 0-20 Years No Basement/All Slab

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Radon FAQ for Montesano, WA

What is the average radon level in Montesano, WA?
Based on 1 user-submitted test, the average radon level in Montesano is 17.00 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 Montesano in?
Montesano and the 98563 zip code are in Grays Harbor County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.
How much does radon mitigation cost in Montesano?
Radon mitigation in Montesano 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 Montesano?
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