Bothell, WA Radon Levels

Q: What EPA Radon Zone is Bothell in?

Bothell is in King County, EPA Zone 3.

Q: How much does radon mitigation cost in Bothell?

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

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

Bothell, WA Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County King County, WA

Zip Code 98011

Positioned in King County within the Seattle Metro area, this community sits on glacial deposits and alluvial soils typical of the Puget Sound region, which generally produce lower radon levels than many other parts of the country. Testing data for zip code 98011 remains unavailable, though Washington's overall radon risk is considered moderate. Homeowners should still consider testing, particularly in homes with basements or those built on fill soils, as individual properties can vary significantly from regional averages.

Bothell, WA Radon Mitigation

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

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Radon FAQ for Bothell, WA

What EPA Radon Zone is Bothell in?

Bothell and the 98011 zip code are in King 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 Bothell?

Radon mitigation in Bothell 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 Bothell?

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.

City	Avg User Radon Level	Submissions
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