Coulee Dam, WA Radon Levels
Check local Coulee Dam radon levels and find certified testing and mitigation professionals to keep your home safe
Coulee Dam, WA Radon Facts
EPA Radon Zone
Zone 1 — High Risk
> 4.0 pCi/L (Zone 1)
County
Okanogan County, WA
Zip Code
99116
Located along the Columbia River in Okanogan County, Coulee Dam is classified as EPA Zone 1 where elevated radon potential exists throughout much of north-central Washington. The area's complex geology, including granite intrusions and metamorphic rock formations, can create conditions favorable for radon gas production and accumulation in homes. With testing data for zip code 99116 currently unavailable, residents should prioritize radon testing given the elevated risk classification.
Coulee Dam, 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 Coulee Dam, WA
What EPA Radon Zone is Coulee Dam in?
Coulee Dam and the 99116 zip code are in Okanogan County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
How much does radon mitigation cost in Coulee Dam?
Radon mitigation in Coulee Dam 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 Coulee Dam?
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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