What EPA's radon map says about Kimble County

EPA places Kimble 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. That puts Kimble County in the 2nd percentile nationally for radon potential — higher than 2% of the counties EPA has rated.

How Kimble County compares

About 4,401 people live in Kimble County, Texas, spread over 1,250.98 square miles. Averaged across its land area, Kimble County runs about 4 people per square mile. Among counties sharing Kimble County's EPA zone, it outranks 7% of them by population. Kimble County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

A Zone 3 county like Kimble 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, Kimble County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in Kimble County

Mitigation cost doesn't depend on Kimble 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

Kimble County's test kit answers today; a Airthings radon monitor keeps answering for Kimble 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

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