What EPA's radon map says about Garden County

EPA places Garden County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 1st percentile for radon potential — Garden County outranks 1% of every county EPA has rated.

Garden County by the numbers

About 1,804 people live in Garden County, Nebraska, spread over 1,704.826 square miles. That works out to roughly 1 people per square mile. Among counties sharing Garden County's EPA zone, it outranks 3% of them by population. Geologically, Garden County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Garden County's Zone 3 prediction is the low end of the scale. A Zone 3 rating means Garden 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 Garden County tests above the action level

Mitigation cost doesn't depend on Garden County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Nebraska's state radon program

Garden County's test kit answers today; a Airthings radon monitor keeps answering for Garden 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. Whatever zone Garden County carries, the zone explainer covers what it does and doesn't tell you about any one house.