Lycoming County, PA radon potential
Lycoming County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 94th percentile for radon potential — Lycoming County outranks 94% of every county EPA has rated.
Where Lycoming County sits nationally
Lycoming County, Pennsylvania is home to about 113,236 people across 1,228.92 square miles. That works out to roughly 92 people per square mile. Within its own EPA zone, Lycoming County is bigger by population than 84% of the counties that share it. EPA's geology-based Region 3 groups Lycoming County with 244 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, Lycoming County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Being in Zone 1 raises the odds Lycoming County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.
Testing and mitigation in Lycoming 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 Pennsylvania's state radon program
For Lycoming County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Lycoming 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 Lycoming County's figures come from
The methodology guide shows exactly which EPA and Census sources feed Lycoming County's numbers. Whatever zone Lycoming County carries, the zone explainer covers what it does and doesn't tell you about any one house.