Stonewall, TX Radon Mitigation and Testing

Q: What EPA Radon Zone is Stonewall in?

Stonewall is in Gillespie County, EPA Zone 3.

Q: How much does radon mitigation cost in Stonewall?

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

Gillespie County

EPA Zone 3

Located in Gillespie County in the Texas Hill Country, Stonewall sits on limestone bedrock formations that can contribute to radon production. With testing data limited for zip code 78671, homeowners should prioritize radon testing to understand their individual risk. The area's German-heritage stone construction and varying foundation types make testing particularly important for establishing safe indoor air quality.

Stonewall, TX Radon Mitigation

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

Stonewall, TX Radon Testing

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

Stonewall Radon Facts

Key details about the radon risk profile for Stonewall and the 78671 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Gillespie County, TX

Zip Code

78671

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Stonewall and the 78671 zip code are located in Gillespie 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 Stonewall, TX

What EPA Radon Zone is Stonewall in?

Stonewall and the 78671 zip code are in Gillespie 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 Stonewall?

Radon mitigation in Stonewall 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 Stonewall?

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