Acadia Parish, LA: EPA's radon zone, explained

Acadia Parish is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Acadia Parish sits at the 23rd percentile nationally for radon potential — above 23 of every 100 rated counties.

How Acadia Parish compares

Acadia Parish, Louisiana is home to about 56,604 people across 655.244 square miles. Averaged across its land area, Acadia Parish runs about 86 people per square mile. By population, Acadia Parish is the 311th largest of every county sharing its EPA zone — the 70th percentile by population within that zone. Geologically, Acadia Parish is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Zone vs. an actual test

At Zone 3, Acadia 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 Acadia Parish — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Acadia Parish

For a Acadia Parish homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Louisiana's state radon program

For Acadia Parish, an ongoing number beats a one-time test - a Airthings radon monitor tracks Acadia Parish's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Acadia Parish's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Acadia Parish carries, the zone explainer covers what it does and doesn't tell you about any one house.