Jennings County, IN radon potential

EPA's own radon map rates Jennings County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally, Jennings County ranks higher in radon potential than 84% of rated counties (the 84th percentile).

How Jennings County compares

Jennings County, Indiana is home to about 27,634 people across 376.601 square miles. Population density there runs about 73 people per square mile. Within its own EPA zone, Jennings County is bigger by population than 54% of the counties that share it. Jennings County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Jennings 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. That doesn't mean every Jennings County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

Testing and mitigation in Jennings County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Indiana's state radon program

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

The methodology guide shows exactly which EPA and Census sources feed Jennings County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.