Golden Valley County, ND radon potential

EPA places Golden Valley 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. Golden Valley County sits at the 67th percentile nationally for radon potential — above 67 of every 100 rated counties.

Golden Valley County by the numbers

Golden Valley County, North Dakota is home to about 1,795 people across 1,000.887 square miles. That works out to roughly 2 people per square mile. Within its own EPA zone, Golden Valley County is bigger by population than 3% of the counties that share it. Geologically, Golden Valley County is grouped into EPA Region 8 alongside 290 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Golden Valley County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. That doesn't mean every Golden Valley County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

If Golden Valley County tests above the action level

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 North Dakota's state radon program

For Golden Valley County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Golden Valley County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Golden Valley County's figures come from

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.