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

EPA places Menard 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. Menard County sits at the 1st percentile nationally for radon potential — above 1 of every 100 rated counties.

Menard County by the numbers

Menard County, Texas is home to about 1,911 people across 902.027 square miles. Population density there runs about 2 people per square mile. By population, Menard County is the 994th largest of every county sharing its EPA zone — the 4th percentile by population within that zone. Geologically, Menard 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 Menard County

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

If Menard County tests above the action level

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

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