Best Radon Testing in San Antonio, TX

How much does radon testing cost in Texas?

Professional radon testing typically costs $175 to $350. Short-term tests (48-96 hours) are used for real estate transactions. Long-term tests (90+ days) provide the most accurate annual average. The EPA recommends professional testing over DIY kits for real estate transactions, though DIY kits ($20-$40) are available at hardware stores. TCEQ publishes county-level radon data for Texas.

Why is radon especially concerning in Texas?

Texas has varying radon levels depending on geology. Measurable radon occurs statewide, including in metro areas, with higher readings more commonly mapped in Hill Country and granite/limestone geology due to bedrock composition. TCEQ considers radon a public health concern and publishes county-level radon data.

Are radon testers required to be certified in Texas?

Texas does not mirror every state's radon-specific license scheme; TCEQ's consumer radon materials and professional organizations like the National Radon Proficiency Program (NRPP) or National Radon Safety Board (NRSB) point homeowners toward certified measurement professionals. For real estate transactions, use a certified professional so the report meets common lender and liability expectations.

What happens if my Texas home has high radon levels?

If radon levels exceed 4 pCi/L, the EPA and TCEQ recommend installing a radon mitigation system. Sub-slab depressurization is the most effective method and typically costs $1,000 to $2,000. Use an experienced mitigator—often NRPP- or NRSB-listed—and expect post-mitigation testing. Mitigation commonly reduces levels by up to 99%.

When should I test for radon in my Texas home?

TCEQ recommends testing all homes, especially where geology suggests higher potential. Test when buying or selling, after major renovations affecting the foundation, or if you have never tested. Testing during cooler months (November through March) with windows closed provides the most representative results. Re-test every 2 years or after major changes to the home.