Fort Bend County, TX: EPA's radon zone, explained

EPA's own radon map rates Fort Bend County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Fort Bend County in the 32nd percentile nationally for radon potential — higher than 32% of the counties EPA has rated.

Where Fort Bend County sits nationally

Fort Bend County, Texas is home to about 958,434 people across 862.089 square miles. Population density there runs about 1,112 people per square mile. By population, Fort Bend County is the 29th largest of every county sharing its EPA zone — the 97th percentile by population within that zone. Fort Bend County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

A Zone 3 county like Fort Bend County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 label describes Fort Bend County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Fort Bend County

For a Fort Bend County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Texas's state radon program

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

Where Fort Bend County's figures come from

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