High Island, TX Radon Mitigation and Testing

Q: What EPA Radon Zone is High Island in?

High Island is in Galveston County, EPA Zone 3.

Q: How much does radon mitigation cost in High Island?

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

Galveston County

EPA Zone 3

High Island, TX resides in Galveston 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. Testing is recommended for all homes in the 77623 zip code area.

High Island, TX Radon Mitigation

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

High Island, TX Radon Testing

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

High Island Radon Facts

Key details about the radon risk profile for High Island and the 77623 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Galveston County, TX

Zip Code

77623

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

High Island and the 77623 zip code are located in Galveston 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 High Island, TX

What EPA Radon Zone is High Island in?

High Island and the 77623 zip code are in Galveston 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 High Island?

Radon mitigation in High Island 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 High Island?

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