Forrest County, MS radon potential

Forrest County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. That puts Forrest County in the 25th percentile nationally for radon potential — higher than 25% of the counties EPA has rated.

Forrest County by the numbers

Forrest County, Mississippi is home to about 78,435 people across 466.042 square miles. Averaged across its land area, Forrest County runs about 168 people per square mile. Within its own EPA zone, Forrest County is bigger by population than 75% of the counties that share it. Forrest County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Forrest County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. Don't read Zone 3 as a pass for Forrest County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Forrest 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 Mississippi's state radon program

For Forrest County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Forrest County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Forrest County's figures come from

Forrest County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.