Republic, WA Radon Mitigation and Testing

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.

Ferry County

EPA Zone 1

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.

Republic, WA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Republic Radon Facts

Key details about the radon risk profile for Republic and the 99166 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Ferry County, WA

Zip Code

99166

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Republic and the 99166 zip code are located in Ferry County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

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 with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Vancouver	6.56 pCi/L	9
Kent	3.60 pCi/L	5
Seattle	5.25 pCi/L	4
Olympia	5.00 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
Washougal	8.00 pCi/L	1
Ridgefield	5.00 pCi/L	1
Moses Lake	No submissions	0