Thornton, TX Radon Mitigation and Testing

Q: What EPA Radon Zone is Thornton in?

Thornton is in Limestone County, EPA Zone 3.

Q: How much does radon mitigation cost in Thornton?

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

Limestone County

EPA Zone 3

Set in rural Limestone County within east-central Texas, Thornton sits over limestone and clay formations that typically produce lower radon levels compared to other geological regions. The small community features primarily slab-on-grade construction and older farmsteads with minimal basement development. While testing data remains sparse for zip code 76687, homeowners should still consider radon testing as individual properties can vary significantly from regional averages.

Thornton, TX Radon Mitigation

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

Thornton, TX Radon Testing

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

Thornton Radon Facts

Key details about the radon risk profile for Thornton and the 76687 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Limestone County, TX

Zip Code

76687

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Thornton and the 76687 zip code are located in Limestone 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 Thornton, TX

What EPA Radon Zone is Thornton in?

Thornton and the 76687 zip code are in Limestone 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 Thornton?

Radon mitigation in Thornton 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 Thornton?

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 Texas

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

City	Avg User Radon Level	Submissions
Lubbock	12.67 pCi/L	9
San Antonio	6.57 pCi/L	7
Austin	6.14 pCi/L	7
Dallas	8.00 pCi/L	5
Abilene	4.50 pCi/L	2
Houston	3.50 pCi/L	2
Plano	6.00 pCi/L	1
Frisco	3.00 pCi/L	1
Nacogdoches	No submissions	0