What EPA's radon map says about Tyler County

EPA places Tyler 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. Tyler County sits at the 14th percentile nationally for radon potential — above 14 of every 100 rated counties.

How Tyler County compares

About 20,560 people live in Tyler County, Texas, spread over 924.39 square miles. Population density there runs about 22 people per square mile. Among counties sharing Tyler County's EPA zone, it outranks 41% of them by population. Geologically, Tyler County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

What this actually means for a house in Tyler County

A Zone 3 county like Tyler County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Even at Zone 3, Tyler County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Tyler County

Mitigation cost doesn't depend on Tyler County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Texas's state radon program

Tyler County's test kit answers today; a Airthings radon monitor keeps answering for Tyler County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

Tyler County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.