Hubbard County, MN: EPA's radon zone, explained

EPA places Hubbard County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 83rd percentile for radon potential — Hubbard County outranks 83% of every county EPA has rated.

How Hubbard County compares

Hubbard County, Minnesota is home to about 22,050 people across 926.028 square miles. Population density there runs about 24 people per square mile. By population, Hubbard County is the 539th largest of every county sharing its EPA zone — the 49th percentile by population within that zone. Hubbard County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Hubbard County

Hubbard County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. That doesn't mean every Hubbard 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 Hubbard County

For a Hubbard 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 Minnesota's state radon program

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

Where Hubbard 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. Whatever zone Hubbard County carries, the zone explainer covers what it does and doesn't tell you about any one house.