Muscatine County, IA: EPA's radon zone, explained

Muscatine County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 88th percentile for radon potential — Muscatine County outranks 88% of every county EPA has rated.

How Muscatine County compares

Muscatine County, Iowa is home to about 42,132 people across 437.44 square miles. Population density there runs about 96 people per square mile. By population, Muscatine County is the 364th largest of every county sharing its EPA zone — the 66th percentile by population within that zone. Geologically, Muscatine County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

What this actually means for a house in Muscatine County

Where the national indoor average runs about 1.3 pCi/L, Muscatine County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. That doesn't mean every Muscatine County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

Next steps for a home in Muscatine County

For a Muscatine 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 Iowa's state radon program

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

Where Muscatine 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.