Bastrop County, TX: EPA's radon zone, explained

EPA's own radon map rates Bastrop County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Rank it against the rest of the country and Bastrop County lands in the 27th percentile for radon potential.

Bastrop County by the numbers

Bastrop County, Texas is home to about 114,931 people across 888.226 square miles. That works out to roughly 129 people per square mile. By population, Bastrop County is the 202nd largest of every county sharing its EPA zone — the 80th percentile by population within that zone. Geologically, Bastrop County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Bastrop 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. Even at Zone 3, Bastrop County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in Bastrop County

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

Where Bastrop 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. Whatever zone Bastrop County carries, the zone explainer covers what it does and doesn't tell you about any one house.