Potter County, PA: EPA's radon zone, explained

EPA's own radon map rates Potter County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally that's the 44th percentile for radon potential — Potter County outranks 44% of every county EPA has rated.

Potter County by the numbers

Potter County, Pennsylvania is home to about 15,993 people across 1,081.249 square miles. That works out to roughly 15 people per square mile. By population, Potter County is the 693rd largest of every county sharing its EPA zone — the 33rd percentile by population within that zone. Potter County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Potter County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Potter County's Zone 2 prediction lands in the gap between the two. Nothing about a Zone 2 label lowers the case for testing in Potter County — EPA recommends it in every zone, moderate included.

Testing and mitigation in Potter County

For a Potter County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Pennsylvania's state radon program

For Potter County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Potter County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Potter County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Potter County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.