Is Pasco County, FL a radon risk area?

EPA places Pasco 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, Pasco County ranks higher in radon potential than 32% of rated counties (the 32nd percentile).

Where Pasco County sits nationally

About 659,114 people live in Pasco County, Florida, spread over 746.608 square miles. Population density there runs about 883 people per square mile. Rank 45 by population within its EPA zone puts Pasco County at the 96th percentile among zone peers. Geologically, Pasco 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 Pasco County

Pasco 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. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Pasco County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Pasco County

Nothing about Pasco County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Florida's state radon program

Pasco County's test kit answers today; a Airthings radon monitor keeps answering for Pasco County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

Pasco County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Pasco County carries, the zone explainer covers what it does and doesn't tell you about any one house.