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

EPA's own radon map rates Cottle County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Cottle County ranks higher in radon potential than 1% of rated counties (the 1st percentile).

Where Cottle County sits nationally

Cottle County, Texas is home to about 1,263 people across 900.564 square miles. Population density there runs about 1 people per square mile. By population, Cottle County is the 1007th largest of every county sharing its EPA zone — the 2nd percentile by population within that zone. Cottle 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 Cottle County

Cottle 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. A Zone 3 label describes Cottle County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Cottle County tests above the action level

For a Cottle 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 Cottle County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Cottle 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 Cottle 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.