San Isidro, TX Radon Mitigation and Testing

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.

Starr County

EPA Zone 3

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.

San Isidro, TX Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

San Isidro Radon Facts

Key details about the radon risk profile for San Isidro and the 78588 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Starr County, TX

Zip Code

78588

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

San Isidro and the 78588 zip code are located in Starr County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

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 with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Lubbock	12.67 pCi/L	9
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