West Baton Rouge Parish, LA: EPA's radon zone, explained

EPA places West Baton Rouge Parish in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 17th percentile for radon potential — West Baton Rouge Parish outranks 17% of every county EPA has rated.

West Baton Rouge Parish by the numbers

West Baton Rouge Parish, Louisiana is home to about 28,425 people across 192.346 square miles. That works out to roughly 148 people per square mile. By population, West Baton Rouge Parish is the 501st largest of every county sharing its EPA zone — the 51st percentile by population within that zone. EPA's geology-based Region 6 groups West Baton Rouge Parish with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in West Baton Rouge Parish

A Zone 3 county like West Baton Rouge 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, West Baton Rouge Parish homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in West Baton Rouge Parish

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

Where West Baton Rouge 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 West Baton Rouge Parish carries, the zone explainer covers what it does and doesn't tell you about any one house.