Karnes City, TX Radon Mitigation and Testing

Q: What EPA Radon Zone is Karnes City in?

Karnes City is in Karnes County, EPA Zone 3.

Q: How much does radon mitigation cost in Karnes City?

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

Karnes County

EPA Zone 3

This Karnes County community within the San Antonio Metro currently has limited radon testing information available. South Texas geology, dominated by limestone and clay formations, can occasionally produce elevated radon readings in certain areas. Testing is recommended for homeowners in zip code 78118, especially those with basement areas or enclosed lower-level spaces.

Karnes City, TX Radon Mitigation

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

Karnes City, TX Radon Testing

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

Karnes City Radon Facts

Key details about the radon risk profile for Karnes City and the 78118 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Karnes County, TX

Zip Code

78118

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Karnes City and the 78118 zip code are located in Karnes 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 Karnes City, TX

What EPA Radon Zone is Karnes City in?

Karnes City and the 78118 zip code are in Karnes 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 Karnes City?

Radon mitigation in Karnes City 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 Karnes City?

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