What EPA's radon map says about Morgan County

Morgan County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Nationally that's the 47th percentile for radon potential — Morgan County outranks 47% of every county EPA has rated.

Where Morgan County sits nationally

About 22,399 people live in Morgan County, Missouri, spread over 597.635 square miles. That works out to roughly 37 people per square mile. Among counties sharing Morgan County's EPA zone, it outranks 43% of them by population. Morgan County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

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, Morgan County's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Morgan County — testing is the only way to know an individual home's actual level.

Testing and mitigation in Morgan County

Mitigation cost doesn't depend on Morgan County'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 Missouri's state radon program

Morgan County's test kit answers today; a Airthings radon monitor keeps answering for Morgan County 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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.