Fulton County, IN radon potential

Fulton County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. That puts Fulton County in the 82nd percentile nationally for radon potential — higher than 82% of the counties EPA has rated.

How Fulton County compares

Fulton County, Indiana is home to about 20,004 people across 368.392 square miles. Population density there runs about 54 people per square mile. Within its own EPA zone, Fulton County is bigger by population than 46% of the counties that share it. Fulton County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Fulton County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Fulton County will test well under the action level, and EPA's guidance is to test regardless of zone.

If Fulton County tests above the action level

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Fulton County carries, the zone explainer covers what it does and doesn't tell you about any one house.