Hernando County, FL radon potential

EPA places Hernando County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 29th percentile for radon potential — Hernando County outranks 29% of every county EPA has rated.

Hernando County by the numbers

Hernando County, Florida is home to about 218,150 people across 472.983 square miles. Population density there runs about 461 people per square mile. Within its own EPA zone, Hernando County is bigger by population than 89% of the counties that share it. Geologically, Hernando County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

What this actually means for a house in Hernando County

Hernando County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 label describes Hernando County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Hernando 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 Florida's state radon program

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

Where Hernando 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.