What EPA's radon map says about Evangeline Parish

EPA's own radon map rates Evangeline Parish zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Evangeline Parish ranks higher in radon potential than 18% of rated counties (the 18th percentile).

Evangeline Parish by the numbers

About 31,745 people live in Evangeline Parish, Louisiana, spread over 662.431 square miles. Averaged across its land area, Evangeline Parish runs about 48 people per square mile. Among counties sharing Evangeline Parish's EPA zone, it outranks 55% of them by population. EPA's geology-based Region 6 groups Evangeline Parish with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Evangeline Parish

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Evangeline Parish's Zone 3 prediction is the low end of the scale. Even at Zone 3, Evangeline 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 Evangeline Parish

Mitigation cost doesn't depend on Evangeline 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

Evangeline Parish's test kit answers today; a Airthings radon monitor keeps answering for Evangeline 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

The methodology guide shows exactly which EPA and Census sources feed Evangeline Parish's numbers. Whatever zone Evangeline Parish carries, the zone explainer covers what it does and doesn't tell you about any one house.