San Isidro, TX Radon Levels

Q: What EPA Radon Zone is San Isidro in?

San Isidro is in Starr County, EPA Zone 3.

Q: How much does radon mitigation cost in San Isidro?

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

Check local San Isidro radon levels and find certified testing and mitigation professionals to keep your home safe

San Isidro, TX Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Starr County, TX

Zip Code 78588

Located in Starr County along the Rio Grande Valley, San Isidro sits on alluvial deposits and clay soils that typically produce lower radon levels compared to areas with granite or limestone bedrock. The community features predominantly single-story residential construction with concrete slab foundations, which are well-suited to the area's stable clay soil conditions and warm climate. While radon testing data is currently limited, the geological characteristics suggest that individual home testing can help residents establish their baseline radon levels in this border region.

San Isidro, TX Radon Mitigation

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

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Radon FAQ for San Isidro, TX

What EPA Radon Zone is San Isidro in?

San Isidro and the 78588 zip code are in Starr 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 San Isidro?

Radon mitigation in San Isidro 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 San Isidro?

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