Karnack, TX Radon Mitigation and Testing

Q: What EPA Radon Zone is Karnack in?

Karnack is in Harrison County, EPA Zone 3.

Q: How much does radon mitigation cost in Karnack?

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

Harrison County

EPA Zone 3

Situated in Harrison County within the Longview Metro area, Karnack currently has limited radon testing data available. East Texas geology, characterized by sandstone and shale formations, typically produces lower radon levels than other regions. However, homeowners in zip code 75661 should still consider testing, particularly those with enclosed crawl spaces or basement areas.

Karnack, TX Radon Mitigation

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

Karnack, TX Radon Testing

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

Karnack Radon Facts

Key details about the radon risk profile for Karnack and the 75661 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Harrison County, TX

Zip Code

75661

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Karnack and the 75661 zip code are located in Harrison 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 Karnack, TX

What EPA Radon Zone is Karnack in?

Karnack and the 75661 zip code are in Harrison 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 Karnack?

Radon mitigation in Karnack 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 Karnack?

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