Steilacoom, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Steilacoom in?

Steilacoom is in Pierce County, EPA Zone 3.

Q: How much does radon mitigation cost in Steilacoom?

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

Pierce County

EPA Zone 3

Located in Pierce County within the Seattle Metro area, Steilacoom sits along Puget Sound where glacial deposits and marine sediments typically result in lower radon potential. While testing data for zip code 98388 remains limited, the coastal geology generally favors moderate radon levels. Homeowners should still consider testing to establish individual risk levels.

Steilacoom, WA Radon Mitigation

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

Steilacoom, WA Radon Testing

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

Steilacoom Radon Facts

Key details about the radon risk profile for Steilacoom and the 98388 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Pierce County, WA

Zip Code

98388

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Steilacoom and the 98388 zip code are located in Pierce 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 Steilacoom, WA

What EPA Radon Zone is Steilacoom in?

Steilacoom and the 98388 zip code are in Pierce 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 Steilacoom?

Radon mitigation in Steilacoom 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 Steilacoom?

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