What EPA's radon map says about Iberia Parish

Iberia Parish is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Iberia Parish lands in the 24th percentile for radon potential.

How Iberia Parish compares

About 67,540 people live in Iberia Parish, Louisiana, spread over 574.74 square miles. Population density there runs about 118 people per square mile. Among counties sharing Iberia Parish's EPA zone, it outranks 73% of them by population. Geologically, Iberia Parish is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

What this actually means for a house in Iberia Parish

A Zone 3 county like Iberia Parish is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Even at Zone 3, Iberia Parish homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Iberia Parish

Mitigation cost doesn't depend on Iberia Parish's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Louisiana's state radon program

Iberia Parish's test kit answers today; a Airthings radon monitor keeps answering for Iberia Parish over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

Iberia Parish's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.