What EPA's radon map says about Real County

Real County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Real County ranks higher in radon potential than 1% of rated counties (the 1st percentile).

How Real County compares

About 2,772 people live in Real County, Texas, spread over 699.16 square miles. Population density there runs about 4 people per square mile. Among counties sharing Real County's EPA zone, it outranks 4% of them by population. EPA's geology-based Region 6 groups Real County with 502 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Real 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. Don't read Zone 3 as a pass for Real County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Real County

Mitigation cost doesn't depend on Real 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 Texas's state radon program

Real County's test kit answers today; a Airthings radon monitor keeps answering for Real 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

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