Is Hettinger County, ND a radon risk area?

EPA places Hettinger County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Hettinger County lands in the 68th percentile for radon potential.

Where Hettinger County sits nationally

About 2,419 people live in Hettinger County, North Dakota, spread over 1,132.239 square miles. Averaged across its land area, Hettinger County runs about 2 people per square mile. Rank 1006 by population within its EPA zone puts Hettinger County at the 6th percentile among zone peers. Geologically, Hettinger County is grouped into EPA Region 8 alongside 290 other counties that share its rock and soil setting.

Zone vs. an actual test

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Hettinger County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. Being in Zone 1 raises the odds Hettinger County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

If Hettinger County tests above the action level

Nothing about Hettinger 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 North Dakota's state radon program

Hettinger County's test kit answers today; a Airthings radon monitor keeps answering for Hettinger 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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Hettinger County carries, the zone explainer covers what it does and doesn't tell you about any one house.