Sherman County, NE radon potential

EPA's own radon map rates Sherman County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Sherman County ranks higher in radon potential than 34% of rated counties (the 34th percentile).

How Sherman County compares

Sherman County, Nebraska is home to about 2,949 people across 565.877 square miles. Averaged across its land area, Sherman County runs about 5 people per square mile. Within its own EPA zone, Sherman County is bigger by population than 5% of the counties that share it. Geologically, Sherman County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

What this actually means for a house in Sherman County

Sherman County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). A county-wide moderate average, like Sherman County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Sherman County

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 Sherman County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Sherman 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 Sherman County's figures come from

Sherman County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Sherman County carries, the zone explainer covers what it does and doesn't tell you about any one house.