What EPA's radon map says about Newton County

EPA's own radon map rates Newton County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Newton County sits at the 43rd percentile nationally for radon potential — above 43 of every 100 rated counties.

Newton County by the numbers

About 14,131 people live in Newton County, Indiana, spread over 401.755 square miles. That works out to roughly 35 people per square mile. Among counties sharing Newton County's EPA zone, it outranks 29% of them by population. Geologically, Newton County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

What this actually means for a house in Newton County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Newton County's Zone 2 prediction lands in the gap between the two. Middle-of-the-pack doesn't mean risk-free for any one Newton County address — a moderate county average still leaves individual homes to test either side of it.

If Newton County tests above the action level

Mitigation cost doesn't depend on Newton 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

Newton County's test kit answers today; a Airthings radon monitor keeps answering for Newton County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

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