Tipton County, IN: EPA's radon zone, explained

Tipton County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 79th percentile for radon potential — Tipton County outranks 79% of every county EPA has rated.

How Tipton County compares

Tipton County, Indiana is home to about 15,324 people across 260.541 square miles. That works out to roughly 59 people per square mile. By population, Tipton County is the 651st largest of every county sharing its EPA zone — the 39th percentile by population within that zone. EPA's geology-based Region 5 groups Tipton County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Tipton County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. Some Tipton County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Next steps for a home in Tipton County

For a Tipton 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 Indiana's state radon program

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

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