Mattawa, WA Radon Levels
Check local Mattawa radon levels and find certified testing and mitigation professionals to keep your home safe
Mattawa, WA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
Grant County, WA
Zip Code
99349
Located in central Grant County along the Columbia River, Mattawa sits on basaltic bedrock and alluvial soils that generally produce moderate radon levels. With limited testing data for this 99349 zip code agricultural community, homeowners should prioritize independent radon assessment. The area's housing includes both traditional homes with basements and manufactured homes on various foundation types.
Mattawa, 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 Mattawa, WA
What EPA Radon Zone is Mattawa in?
Mattawa and the 99349 zip code are in Grant County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
How much does radon mitigation cost in Mattawa?
Radon mitigation in Mattawa 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 Mattawa?
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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