Onia, AR Radon Mitigation and Testing

Q: What EPA Radon Zone is Onia in?

Onia is in Stone County, EPA Zone 2.

Q: How much does radon mitigation cost in Onia?

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

Stone County

EPA Zone 2

Nestled in the Arkansas Ozarks within Stone County, Onia sits over the region's characteristic limestone and dolomite formations that can contribute to moderate radon levels in enclosed spaces. The area's housing includes both traditional mountain homes and newer rural construction, with many properties featuring partial basements or built into hillsides. While specific radon data for the 72663 zip code remains limited, the underlying geology suggests residents should test their homes for radon accumulation.

Onia, AR Radon Mitigation

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

Onia, AR Radon Testing

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

Onia Radon Facts

Key details about the radon risk profile for Onia and the 72663 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Stone County, AR

Zip Code

72663

Predicted Screening Level

2–4 pCi/L (Zone 2)

Onia and the 72663 zip code are located in Stone 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 Onia, AR

What EPA Radon Zone is Onia in?

Onia and the 72663 zip code are in Stone 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 Onia?

Radon mitigation in Onia 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 Onia?

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 Arkansas

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

City	Avg User Radon Level	Submissions
Hot Springs Village	11.60 pCi/L	5
Bentonville	4.00 pCi/L	4
Bella Vista	13.67 pCi/L	3
Little Rock	7.00 pCi/L	1