Marshall, TX Radon Mitigation and Testing

Q: What EPA Radon Zone is Marshall in?

Marshall is in Harrison County, EPA Zone 3.

Q: How much does radon mitigation cost in Marshall?

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, Marshall's radon profile reflects East Texas's typical low-risk geological conditions. The 75670 zip code area sits over Cretaceous-era sedimentary deposits that generally produce minimal radon emissions. However, homeowners should still consider testing, as individual properties can occasionally exceed typical regional levels due to localized soil conditions or construction factors.

Marshall, TX Radon Mitigation

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

Marshall, TX Radon Testing

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

Marshall Radon Facts

Key details about the radon risk profile for Marshall and the 75670 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Harrison County, TX

Zip Code

75670

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Marshall and the 75670 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 Marshall, TX

What EPA Radon Zone is Marshall in?

Marshall and the 75670 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 Marshall?

Radon mitigation in Marshall 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 Marshall?

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