Is Dodge County, MN a radon risk area?

EPA's own radon map rates Dodge County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Rank it against the rest of the country and Dodge County lands in the 82nd percentile for radon potential.

Dodge County by the numbers

About 21,242 people live in Dodge County, Minnesota, spread over 439.396 square miles. Averaged across its land area, Dodge County runs about 48 people per square mile. Rank 555 by population within its EPA zone puts Dodge County at the 48th percentile among zone peers. EPA's geology-based Region 5 groups Dodge County with 523 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, Dodge 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 Dodge County specifically.

Testing and mitigation in Dodge County

Nothing about Dodge County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Minnesota's state radon program

Dodge County's test kit answers today; a Airthings radon monitor keeps answering for Dodge County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

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