DeWitt County, TX radon potential

EPA's own radon map rates DeWitt County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 13th percentile for radon potential — DeWitt County outranks 13% of every county EPA has rated.

Where DeWitt County sits nationally

DeWitt County, Texas is home to about 20,252 people across 908.976 square miles. That works out to roughly 22 people per square mile. Within its own EPA zone, DeWitt County is bigger by population than 41% of the counties that share it. EPA's geology-based Region 6 groups DeWitt County with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, DeWitt County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for DeWitt County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in DeWitt County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Texas's state radon program

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

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