What EPA's radon map says about West Feliciana Parish

West Feliciana Parish is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. West Feliciana Parish sits at the 10th percentile nationally for radon potential — above 10 of every 100 rated counties.

How West Feliciana Parish compares

About 15,155 people live in West Feliciana Parish, Louisiana, spread over 403.219 square miles. That works out to roughly 38 people per square mile. Among counties sharing West Feliciana Parish's EPA zone, it outranks 32% of them by population. West Feliciana Parish falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

At Zone 3, West Feliciana Parish's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Don't read Zone 3 as a pass for West Feliciana Parish — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in West Feliciana Parish

Mitigation cost doesn't depend on West Feliciana 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

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

More on how this number was built

West Feliciana Parish's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.