Bremer County, IA radon potential

Bremer County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally, Bremer County ranks higher in radon potential than 84% of rated counties (the 84th percentile).

How Bremer County compares

Bremer County, Iowa is home to about 25,328 people across 435.479 square miles. That works out to roughly 58 people per square mile. Within its own EPA zone, Bremer County is bigger by population than 52% of the counties that share it. EPA's geology-based Region 7 groups Bremer County with 411 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Where the national indoor average runs about 1.3 pCi/L, Bremer County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. 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 Bremer County specifically.

If Bremer County tests above the action level

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Iowa's state radon program

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

Where Bremer 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.