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

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

How Fisher County compares

Fisher County, Texas is home to about 3,665 people across 898.951 square miles. Population density there runs about 4 people per square mile. By population, Fisher County is the 964th largest of every county sharing its EPA zone — the 7th percentile by population within that zone. EPA's geology-based Region 6 groups Fisher County with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Fisher County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Fisher County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Fisher County tests above the action level

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

The methodology guide shows exactly which EPA and Census sources feed Fisher County's numbers. Whatever zone Fisher County carries, the zone explainer covers what it does and doesn't tell you about any one house.