Dent County, MO: EPA's radon zone, explained

EPA's own radon map rates Dent 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 — Dent County outranks 43% of every county EPA has rated.

How Dent County compares

Dent County, Missouri is home to about 14,721 people across 752.761 square miles. Population density there runs about 20 people per square mile. By population, Dent County is the 719th largest of every county sharing its EPA zone — the 30th percentile by population within that zone. EPA's geology-based Region 7 groups Dent County with 411 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Dent County's Zone 2 prediction lands in the gap between the two. Middle-of-the-pack doesn't mean risk-free for any one Dent County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Dent County

For a Dent 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 Missouri's state radon program

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

Where Dent County's figures come from

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