Grand Isle, LA Radon Mitigation and Testing

Q: What EPA Radon Zone is Grand Isle in?

Grand Isle is in Jefferson Parish County, EPA Zone 3.

Q: How much does radon mitigation cost in Grand Isle?

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

Jefferson Parish County

EPA Zone 3

Barrier island community Grand Isle in Jefferson Parish sits on Mississippi River delta sediments within the New Orleans Metro area. The coastal location's sandy soils and elevated construction typically result in lower radon levels, though limited testing data for zip code 70358 means individual homes should still be tested.

Grand Isle, LA Radon Mitigation

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

Grand Isle, LA Radon Testing

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

Grand Isle Radon Facts

Key details about the radon risk profile for Grand Isle and the 70358 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Jefferson Parish County, LA

Zip Code

70358

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Grand Isle and the 70358 zip code are located in Jefferson Parish 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 Grand Isle, LA

What EPA Radon Zone is Grand Isle in?

Grand Isle and the 70358 zip code are in Jefferson 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 Grand Isle?

Radon mitigation in Grand Isle 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 Grand Isle?

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 with the most user-submitted radon test data in the state.

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