Lincoln County, ME radon potential

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 87th percentile nationally for radon potential — higher than 87% of the counties EPA has rated.

Where Lincoln County sits nationally

Lincoln County, Maine is home to about 36,491 people across 455.867 square miles. Population density there runs about 80 people per square mile. Within its own EPA zone, Lincoln County is bigger by population than 61% of the counties that share it. EPA's geology-based Region 1 groups Lincoln County with 58 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Lincoln County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. That doesn't mean every Lincoln 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.

Next steps for a home in Lincoln County

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 Maine'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. Use code RADONZONE-10OFF at checkout for 10% off.

Where Lincoln 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. Whatever zone Lincoln County carries, the zone explainer covers what it does and doesn't tell you about any one house.