Sumas, WA Radon Levels
Check local Sumas radon levels and find certified testing and mitigation professionals to keep your home safe
Sumas, WA Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Whatcom County, WA
Zip Code
98295
Located in Whatcom County near the Canadian border, Sumas sits in glacial river valley deposits that typically show lower radon potential compared to mountainous regions. Current testing data for zip code 98295 is sparse, but the area's alluvial soils and moderate marine climate generally reduce radon accumulation. Local homes range from early farmhouses to modern construction, with most featuring crawl space or slab foundations.
Sumas, 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 Sumas, WA
What EPA Radon Zone is Sumas in?
Sumas and the 98295 zip code are in Whatcom 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 Sumas?
Radon mitigation in Sumas 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 Sumas?
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.
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