Is Howard County, NE a radon risk area?

Howard County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Rank it against the rest of the country and Howard County lands in the 37th percentile for radon potential.

Howard County by the numbers

About 6,572 people live in Howard County, Nebraska, spread over 569.27 square miles. Population density there runs about 12 people per square mile. Rank 911 by population within its EPA zone puts Howard County at the 12th percentile among zone peers. EPA's geology-based Region 7 groups Howard County with 411 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Howard County

Howard 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). Howard County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

If Howard County tests above the action level

Nothing about Howard County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Nebraska's state radon program

Howard County's test kit answers today; a Airthings radon monitor keeps answering for Howard County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

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.