Is Avoyelles Parish, LA a radon risk area?

EPA places Avoyelles 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. Avoyelles Parish sits at the 20th percentile nationally for radon potential — above 20 of every 100 rated counties.

Where Avoyelles Parish sits nationally

About 38,373 people live in Avoyelles Parish, Louisiana, spread over 831.363 square miles. Population density there runs about 46 people per square mile. Rank 415 by population within its EPA zone puts Avoyelles Parish at the 60th percentile among zone peers. Avoyelles Parish falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Avoyelles 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 label describes Avoyelles Parish's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Avoyelles Parish tests above the action level

Nothing about Avoyelles 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

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

Avoyelles Parish's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Avoyelles Parish carries, the zone explainer covers what it does and doesn't tell you about any one house.