Longview, WA Radon Levels
Check local Longview radon levels and find certified testing and mitigation professionals to keep your home safe
Longview, WA Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Cowlitz County, WA
Zip Code
98632
Positioned along the Columbia River in southwestern Washington's Cowlitz County, Longview sits on river terrace deposits over Columbia River Basalt that generally produce lower radon levels. Testing data for zip code 98632 is currently limited, though the area's volcanic geology and marine-influenced climate typically reduce radon accumulation. Residents should still consider testing, particularly in homes built into hillsides or those with significant below-grade construction.
Longview, 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 Longview, WA
What EPA Radon Zone is Longview in?
Longview and the 98632 zip code are in Cowlitz 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 Longview?
Radon mitigation in Longview 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 Longview?
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.