Izard County, AR: EPA's radon zone, explained

EPA's own radon map rates Izard County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally that's the 43rd percentile for radon potential — Izard County outranks 43% of every county EPA has rated.

Where Izard County sits nationally

Izard County, Arkansas is home to about 14,291 people across 580.201 square miles. Population density there runs about 25 people per square mile. By population, Izard County is the 728th largest of every county sharing its EPA zone — the 29th percentile by population within that zone. EPA's geology-based Region 6 groups Izard County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Izard County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Izard County's Zone 2 prediction lands in the gap between the two. A county-wide moderate average, like Izard County's, can still hide a specific house well above or below it — testing is what actually answers the question.

If Izard County tests above the action level

For a Izard County 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 Arkansas's state radon program

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

Where Izard County'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 Izard County carries, the zone explainer covers what it does and doesn't tell you about any one house.