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

EPA's own radon map rates Susquehanna County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally, Susquehanna County ranks higher in radon potential than 87% of rated counties (the 87th percentile).

How Susquehanna County compares

Susquehanna County, Pennsylvania is home to about 38,100 people across 823.494 square miles. Population density there runs about 46 people per square mile. By population, Susquehanna County is the 395th largest of every county sharing its EPA zone — the 63rd percentile by population within that zone. Susquehanna County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Susquehanna County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Susquehanna County specifically.

Testing and mitigation in Susquehanna County

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

Where Susquehanna County's figures come from

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