What EPA's radon map says about Jackson County

EPA places Jackson 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. Nationally, Jackson County ranks higher in radon potential than 55% of rated counties (the 55th percentile).

Jackson County by the numbers

About 47,420 people live in Jackson County, Indiana, spread over 509.978 square miles. That works out to roughly 93 people per square mile. Among counties sharing Jackson County's EPA zone, it outranks 66% of them by population. EPA's geology-based Region 5 groups Jackson County with 523 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Jackson 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). A county-wide moderate average, like Jackson County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Jackson County

Mitigation cost doesn't depend on Jackson 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 Indiana's state radon program

Jackson County's test kit answers today; a Airthings radon monitor keeps answering for Jackson 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

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