Republic, WA Radon Levels

Q: What EPA Radon Zone is Republic in?

Republic is in Ferry County, EPA Zone 1.

Q: How much does radon mitigation cost in Republic?

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

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

Republic, WA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Ferry County, WA

Zip Code 99166

Nestled in Ferry County within northeastern Washington's mountainous terrain, Republic (99166) sits among granitic and metamorphic formations that typically produce lower radon levels. While the area falls within EPA Zone 1 and current testing data is limited, the community's mining history and varied geological conditions mean radon levels can differ considerably between properties. Washington residents, particularly in areas with historical mining activity, should test their homes to establish baseline readings.

Republic, WA Radon Mitigation

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

Need Radon Mitigation or Testing in Republic?

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Radon FAQ for Republic, WA

What EPA Radon Zone is Republic in?

Republic and the 99166 zip code are in Ferry 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 Republic?

Radon mitigation in Republic 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 Republic?

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