Radon Levels in Louisiana
Louisiana is classified as an EPA Zone 3 state with a low risk for radon. Average indoor radon levels range from 0.2 to 1 pCi/L, and approximately 2% of Louisiana homes test above the EPA action level of 4.0 pCi/L.
Louisiana Radon Summary
Key Facts About Radon in Louisiana
- Louisiana has very low radon levels due to its flat, alluvial geology
- The Mississippi River delta soil contains little uranium-bearing rock
- Slab-on-grade construction dominates, further limiting radon entry
Louisiana Testing Requirements & Recommendations
No state mandate. EPA recommends testing but risk is low in Louisiana.
Radon mitigation is rarely needed in Louisiana.
Major Cities in Louisiana
Radon levels can vary significantly within Louisiana depending on local geology. All residents — regardless of city — should test their specific home, as neighborhood-level radon varies independently of broader state and county averages.
What Should Louisiana Residents Do?
Test Your Home
Use a short-term charcoal test kit ($15–$25) for an initial reading, or a continuous radon detector for ongoing monitoring. Test in your basement or lowest livable area.
Understand Your Result
If your result is below 2.0 pCi/L: monitor periodically. Between 2.0–4.0 pCi/L: consider mitigation. Above 4.0 pCi/L: the EPA recommends mitigation. Above 8.0 pCi/L: take action promptly.
Hire a Certified Contractor if Needed
Look for NRPP or NRSB-certified radon mitigation contractors in Louisiana. Mitigation systems typically cost $800–$2,500 and can reduce radon levels by 50–99%.
Verify with a Follow-Up Test
After mitigation, test again to confirm the system is working. Retest every 2 years, or after significant home renovations.
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