Lincoln County, CO radon potential

Lincoln County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Lincoln County sits at the 71st percentile nationally for radon potential — above 71 of every 100 rated counties.

Lincoln County by the numbers

Lincoln County, Colorado is home to about 5,598 people across 2,577.73 square miles. Averaged across its land area, Lincoln County runs about 2 people per square mile. Within its own EPA zone, Lincoln County is bigger by population than 16% of the counties that share it. Geologically, Lincoln County is grouped into EPA Region 8 alongside 290 other counties that share its rock and soil setting.

What this actually means for a house in Lincoln County

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

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 Colorado'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. RADONZONE-10OFF at checkout knocks 10% off.

Where Lincoln County's figures come from

Lincoln County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.