Is Concordia Parish, LA a radon risk area?

Concordia Parish is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Concordia Parish sits at the 12th percentile nationally for radon potential — above 12 of every 100 rated counties.

Concordia Parish by the numbers

About 17,797 people live in Concordia Parish, Louisiana, spread over 695.706 square miles. That works out to roughly 26 people per square mile. Rank 668 by population within its EPA zone puts Concordia Parish at the 35th percentile among zone peers. Geologically, Concordia 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 Concordia Parish

Concordia Parish's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 rating means Concordia Parish's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Next steps for a home in Concordia Parish

Nothing about Concordia Parish's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Louisiana's state radon program

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

More on how this number was built

Concordia 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.