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

EPA's own radon map rates Burke County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. That puts Burke County in the 67th percentile nationally for radon potential — higher than 67% of the counties EPA has rated.

How Burke County compares

Burke County, North Dakota is home to about 2,154 people across 1,103.619 square miles. Population density there runs about 2 people per square mile. By population, Burke County is the 1023rd largest of every county sharing its EPA zone — the 4th percentile by population within that zone. EPA's geology-based Region 8 groups Burke County with 290 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Burke County

Burke County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. 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 Burke County specifically.

Next steps for a home in Burke County

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

Where Burke County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Burke County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.