What EPA's radon map says about Houston County

EPA's own radon map rates Houston County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 28th percentile for radon potential — Houston County outranks 28% of every county EPA has rated.

How Houston County compares

About 174,897 people live in Houston County, Georgia, spread over 376.156 square miles. Averaged across its land area, Houston County runs about 465 people per square mile. Among counties sharing Houston County's EPA zone, it outranks 86% of them by population. Geologically, Houston 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 Houston County

Houston 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 Houston County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Houston County

Mitigation cost doesn't depend on Houston County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Georgia's state radon program

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Houston County's numbers. Whatever zone Houston County carries, the zone explainer covers what it does and doesn't tell you about any one house.