Ephrata, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Ephrata in?

Ephrata is in Grant County, EPA Zone 2.

Q: How much does radon mitigation cost in Ephrata?

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

Grant County

EPA Zone 2

Central Washington's Grant County city of Ephrata sits in the Columbia Basin where basalt bedrock and irrigated soils typically produce moderate radon levels across zip code 98823. The area's mix of mid-century homes and agricultural properties features varied foundation types from full basements to slab-on-grade construction. With limited testing data available, homeowners should conduct independent radon measurements to assess their specific risk levels.

Ephrata, WA Radon Mitigation

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

Ephrata, WA Radon Testing

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

Ephrata Radon Facts

Key details about the radon risk profile for Ephrata and the 98823 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Grant County, WA

Zip Code

98823

Predicted Screening Level

2–4 pCi/L (Zone 2)

Ephrata and the 98823 zip code are located in Grant County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Ephrata, WA

What EPA Radon Zone is Ephrata in?

Ephrata and the 98823 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 Ephrata?

Radon mitigation in Ephrata 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 Ephrata?

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