What EPA's radon map says about Holt County

EPA's own radon map rates Holt County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Rank it against the rest of the country and Holt County lands in the 7th percentile for radon potential.

Holt County by the numbers

About 10,120 people live in Holt County, Nebraska, spread over 2,411.851 square miles. Population density there runs about 4 people per square mile. Among counties sharing Holt County's EPA zone, it outranks 21% of them by population. Holt County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Holt 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 label describes Holt County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Holt County

Mitigation cost doesn't depend on Holt 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

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

More on how this number was built

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