San Antonio, TX Radon Levels
Check local San Antonio radon levels and find certified testing and mitigation professionals to keep your home safe
San Antonio, TX Radon Facts
Texas's second-largest city in Bexar County shows an average radon level of 6.57 pCi/L, which exceeds the EPA action threshold of 4.0 pCi/L. Built primarily on Edwards Plateau limestone and clay soils, the city's diverse housing stock ranges from historic downtown structures to modern suburban developments, with most featuring concrete slab foundations. Testing data from seven measurements across multiple zip codes (78201-78211) reveals readings from 3.0 to 17.0 pCi/L, demonstrating significant variation that makes individual home testing essential for residents throughout the San Antonio metro area.
Based on 8 user-submitted radon tests for homes in San Antonio, TX. The EPA recommends taking action at or above 4.0 pCi/L.
San Antonio, TX Radon Mitigation
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San Antonio, TX Radon Levels
User-submitted radon test readings from homes in the San Antonio area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 3 pCi/L | San Antonio, TX | 0-20 Years | No Basement/All Slab |
| 3 pCi/L | San Antonio, TX | 0-20 Years | No Basement/All Slab |
| 8 pCi/L | San Antonio, TX | 21-50 Years | No Basement/All Slab |
| 5 pCi/L | San Antonio, TX | 21-50 Years | No Basement/All Slab |
| 7 pCi/L | San Antonio, TX | — | No Basement/All Slab |
Have a radon test result for San Antonio? Submit your reading to help other homeowners.
Radon FAQ for San Antonio, TX
What is the average radon level in San Antonio, TX?
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Most Active Radon Markets in Texas
Cities in Texas with the most user-submitted radon test data, ranked by number of submissions.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Lubbock | 12.70 pCi/L | 10 |
| 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 |