Castroville, TX Radon Levels
Check local Castroville radon levels and find certified testing and mitigation professionals to keep your home safe
Castroville, TX Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Medina County, TX
Zip Code
78009
Positioned in Medina County within the San Antonio Metro region, Castroville sits on the Edwards Plateau where limestone bedrock can create localized radon conditions. Testing data for the 78009 zip code area remains limited, making individual home assessment important for residents. The community's historic German architecture and mix of older stone foundations with newer construction presents varying radon entry potential.
Castroville, TX Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Castroville?
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Radon FAQ for Castroville, TX
What EPA Radon Zone is Castroville in?
Castroville and the 78009 zip code are in Medina 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 Castroville?
Radon mitigation in Castroville 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 Castroville?
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 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 |