What EPA's radon map says about Lincoln County

Lincoln County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Lincoln County lands in the 22nd percentile for radon potential.

How Lincoln County compares

About 51,212 people live in Lincoln County, Oregon, spread over 980.989 square miles. Population density there runs about 52 people per square mile. Among counties sharing Lincoln County's EPA zone, it outranks 67% of them by population. Geologically, Lincoln County is grouped into EPA Region 10 alongside 141 other counties that share its rock and soil setting.

Zone vs. an actual test

Lincoln County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 rating means Lincoln County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Lincoln County

Mitigation cost doesn't depend on Lincoln County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Oregon's state radon program

Lincoln County's test kit answers today; a Airthings radon monitor keeps answering for Lincoln 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 Lincoln County carries, the zone explainer covers what it does and doesn't tell you about any one house.