Lane County, OR radon potential

EPA's own radon map rates Lane County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 31st percentile for radon potential — Lane County outranks 31% of every county EPA has rated.

Where Lane County sits nationally

Lane County, Oregon is home to about 382,396 people across 4,554.092 square miles. That works out to roughly 84 people per square mile. Within its own EPA zone, Lane County is bigger by population than 93% of the counties that share it. Lane County falls in EPA Radon Region 10, one of 142 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

At Zone 3, Lane County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. A Zone 3 label describes Lane County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Lane 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 Oregon's state radon program

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

Lane County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Lane County carries, the zone explainer covers what it does and doesn't tell you about any one house.