Angelina County, TX Radon Zone Data

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

EPA's own radon map rates Angelina County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Angelina County sits at the 26th percentile nationally for radon potential — above 26 of every 100 rated counties.

Angelina County by the numbers

Angelina County, Texas is home to about 88,094 people across 797.867 square miles. Population density there runs about 110 people per square mile. By population, Angelina County is the 233rd largest of every county sharing its EPA zone — the 77th percentile by population within that zone. EPA's geology-based Region 6 groups Angelina County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Angelina County

Angelina County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 rating means Angelina 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.

If Angelina County tests above the action level

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

Where Angelina County's figures come from

Angelina County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.