Brown County, NE radon potential

EPA's own radon map rates Brown County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Brown County sits at the 2nd percentile nationally for radon potential — above 2 of every 100 rated counties.

Where Brown County sits nationally

Brown County, Nebraska is home to about 2,877 people across 1,221.405 square miles. Averaged across its land area, Brown County runs about 2 people per square mile. Within its own EPA zone, Brown County is bigger by population than 5% of the counties that share it. EPA's geology-based Region 7 groups Brown County with 411 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Brown County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 rating means Brown County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

If Brown 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 Nebraska's state radon program

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

Where Brown 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.