What EPA's radon map says about Hocking County

EPA places Hocking County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Hocking County sits at the 49th percentile nationally for radon potential — above 49 of every 100 rated counties.

Hocking County by the numbers

About 27,429 people live in Hocking County, Ohio, spread over 421.349 square miles. Population density there runs about 65 people per square mile. Among counties sharing Hocking County's EPA zone, it outranks 50% of them by population. EPA's geology-based Region 5 groups Hocking County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Hocking County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Middle-of-the-pack doesn't mean risk-free for any one Hocking County address — a moderate county average still leaves individual homes to test either side of it.

If Hocking County tests above the action level

Mitigation cost doesn't depend on Hocking 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 Ohio's state radon program

Hocking County's test kit answers today; a Airthings radon monitor keeps answering for Hocking 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 Hocking County carries, the zone explainer covers what it does and doesn't tell you about any one house.