Ritchie County, WV: EPA's radon zone, explained

Ritchie County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. That puts Ritchie County in the 38th percentile nationally for radon potential — higher than 38% of the counties EPA has rated.

Ritchie County by the numbers

Ritchie County, West Virginia is home to about 8,170 people across 451.99 square miles. That works out to roughly 18 people per square mile. By population, Ritchie County is the 866th largest of every county sharing its EPA zone — the 16th percentile by population within that zone. EPA's geology-based Region 3 groups Ritchie County with 244 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Ritchie County's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Ritchie County — testing is the only way to know an individual home's actual level.

Next steps for a home in Ritchie County

For a Ritchie 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 West Virginia's state radon program

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

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