Chambers County, TX radon potential

EPA places Chambers County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Chambers County sits at the 23rd percentile nationally for radon potential — above 23 of every 100 rated counties.

How Chambers County compares

Chambers County, Texas is home to about 56,179 people across 597.232 square miles. Population density there runs about 94 people per square mile. Within its own EPA zone, Chambers County is bigger by population than 70% of the counties that share it. EPA's geology-based Region 6 groups Chambers County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Chambers County

Chambers 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 Chambers County — EPA's guidance to test every home makes no exception for counties predicted low.

If Chambers County tests above the action level

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 Chambers County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Chambers 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 Chambers County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Chambers County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.