What EPA's radon map says about Pendleton County

EPA's own radon map rates Pendleton County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 72nd percentile for radon potential — Pendleton County outranks 72% of every county EPA has rated.

Where Pendleton County sits nationally

About 5,944 people live in Pendleton County, West Virginia, spread over 696.05 square miles. That works out to roughly 9 people per square mile. Among counties sharing Pendleton County's EPA zone, it outranks 17% of them by population. EPA's geology-based Region 3 groups Pendleton County with 244 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Pendleton County

Pendleton 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 Pendleton County specifically.

Testing and mitigation in Pendleton County

Mitigation cost doesn't depend on Pendleton 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 West Virginia's state radon program

Pendleton County's test kit answers today; a Airthings radon monitor keeps answering for Pendleton County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 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 Pendleton County carries, the zone explainer covers what it does and doesn't tell you about any one house.