Lincoln County, NV: EPA's radon zone, explained

EPA places Lincoln 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. That puts Lincoln County in the 70th percentile nationally for radon potential — higher than 70% of the counties EPA has rated.

Lincoln County by the numbers

Lincoln County, Nevada is home to about 4,345 people across 10,633.386 square miles. That works out to roughly 0 people per square mile. By population, Lincoln County is the 941st largest of every county sharing its EPA zone — the 12th percentile by population within that zone. EPA's geology-based Region 9 groups Lincoln County with 94 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Where the national indoor average runs about 1.3 pCi/L, Lincoln County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Lincoln County will test well under the action level, and EPA's guidance is to test regardless of zone.

If Lincoln County tests above the action level

For a Lincoln County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Nevada's state radon program

For Lincoln County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Lincoln 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 Lincoln County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Lincoln County's numbers. Whatever zone Lincoln County carries, the zone explainer covers what it does and doesn't tell you about any one house.