Columbia, LA Radon Levels

Q: What EPA Radon Zone is Columbia in?

Columbia is in Caldwell Parish County, EPA Zone 3.

Q: How much does radon mitigation cost in Columbia?

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

Check local Columbia radon levels and find certified testing and mitigation professionals to keep your home safe

Columbia, LA Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Caldwell Parish County, LA

Zip Code 71418

This small community in north-central Louisiana's Caldwell Parish sits within the Gulf Coastal Plain where deep sedimentary deposits typically produce very low radon levels. The 71418 zip code, part of the Monroe metropolitan area, features predominantly single-story homes with slab foundations suited to the region's clay soils and high water table. While testing data is currently unavailable, the geological setting suggests minimal radon risk, though individual assessment remains the definitive evaluation method.

Columbia, LA Radon Mitigation

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

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Radon FAQ for Columbia, LA

What EPA Radon Zone is Columbia in?

Columbia and the 71418 zip code are in Caldwell Parish 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 Columbia?

Radon mitigation in Columbia 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 Columbia?

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 Louisiana

Cities in Louisiana with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
New Orleans	8.00 pCi/L	1