Colorado County, TX Radon Zone Data

Colorado County, TX radon potential

EPA's own radon map rates Colorado 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 Colorado County lands in the 14th percentile for radon potential.

How Colorado County compares

Colorado County, Texas is home to about 21,475 people across 960.291 square miles. Population density there runs about 22 people per square mile. Within its own EPA zone, Colorado County is bigger by population than 43% of the counties that share it. Colorado County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Colorado County

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Colorado County's Zone 3 prediction is the low end of the scale. A Zone 3 rating means Colorado County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Colorado 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 Colorado County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Colorado 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 Colorado County's figures come from

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