Cerro Gordo County, IA Radon Zone Data

Cerro Gordo County, IA: EPA's radon zone, explained

Cerro Gordo County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Cerro Gordo County sits at the 89th percentile nationally for radon potential — above 89 of every 100 rated counties.

Cerro Gordo County by the numbers

Cerro Gordo County, Iowa is home to about 42,493 people across 568.302 square miles. Averaged across its land area, Cerro Gordo County runs about 75 people per square mile. By population, Cerro Gordo County is the 360th largest of every county sharing its EPA zone — the 66th percentile by population within that zone. Geologically, Cerro Gordo County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Zone vs. an actual test

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Cerro Gordo County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Cerro Gordo County specifically.

Next steps for a home in Cerro Gordo County

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

Where Cerro Gordo County's figures come from

Cerro Gordo County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.