Montesano, WA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 17.00 pCi/L.

Q: What EPA Radon Zone is Montesano in?

Montesano is in Grays Harbor County, EPA Zone 3.

Q: How much does radon mitigation cost in Montesano?

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

Avg: 17.00 pCi/L

Grays Harbor County

EPA Zone 3

1 user test

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.

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.

Montesano, WA Radon Testing

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

Montesano, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
17 pCi/L	Montesano, WA	0-20 Years	No Basement/All Slab	Feb 2022

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

Montesano Radon Facts

Key details about the radon risk profile for Montesano and the 98563 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Grays Harbor County, WA

Zip Code

98563

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

17.00 pCi/L

User Tests Submitted

Montesano and the 98563 zip code are located in Grays Harbor County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

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 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