Winthrop, AR Radon Mitigation and Testing

Q: What EPA Radon Zone is Winthrop in?

Winthrop is in Little River County, EPA Zone 3.

Q: How much does radon mitigation cost in Winthrop?

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

Little River County

EPA Zone 3

Positioned in Little River County near Arkansas's southwestern border, Winthrop sits on Coastal Plain sedimentary formations typical of the region's geology. The rural community's housing stock includes older farmhouses and newer construction, with many homes featuring pier and beam or slab-on-grade foundations suited to the local soil conditions. Since radon testing data is not currently available for zip code 71866, homeowners should consider individual testing to understand their specific radon exposure potential.

Winthrop, AR Radon Mitigation

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

Winthrop, AR Radon Testing

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

Winthrop Radon Facts

Key details about the radon risk profile for Winthrop and the 71866 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Little River County, AR

Zip Code

71866

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Winthrop and the 71866 zip code are located in Little River County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Winthrop, AR

What EPA Radon Zone is Winthrop in?

Winthrop and the 71866 zip code are in Little River County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Winthrop?

Radon mitigation in Winthrop 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 Winthrop?

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