Marion, TX Radon Levels
Check local Marion radon levels and find certified testing and mitigation professionals to keep your home safe
Marion, TX Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Guadalupe County, TX
Zip Code
78124
Situated in Guadalupe County within the San Antonio metropolitan area, Marion sits atop Edwards Plateau limestone formations that can create variable radon conditions. Limited testing data makes it difficult to assess local radon patterns for this growing community. Despite Texas's generally lower radon risk, homeowners should consider testing as limestone bedrock can occasionally produce elevated readings.
Marion, 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 Marion?
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Radon FAQ for Marion, TX
What EPA Radon Zone is Marion in?
Marion and the 78124 zip code are in Guadalupe 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 Marion?
Radon mitigation in Marion 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 Marion?
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 |