Bottineau County, ND: EPA's radon zone, explained

EPA's own radon map rates Bottineau 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 Bottineau County lands in the 72nd percentile for radon potential.

Where Bottineau County sits nationally

Bottineau County, North Dakota is home to about 6,391 people across 1,668.859 square miles. That works out to roughly 4 people per square mile. By population, Bottineau County is the 869th largest of every county sharing its EPA zone — the 18th percentile by population within that zone. Bottineau County falls in EPA Radon Region 8, one of 291 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Bottineau 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 Bottineau County specifically.

Testing and mitigation in Bottineau County

For a Bottineau 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 North Dakota's state radon program

For Bottineau County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Bottineau 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 Bottineau 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.