Sinkhole risk in McMullen County, TX: No soluble rock mapped

No soluble rock mapped

No soluble bedrock mapped.

On soluble rock: 0%
At or near the surface: 0%
Buried under cover: 0%

The next step for one property

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 1,140 square miles, under one square mile of McMullen County maps onto soluble rock. With about 565 residents (0 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 396 map points about 1.7 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: why gypsum and salt move faster than limestone, and how these percentages are measured.

Counties around McMullen County

The nearest county rated sinkhole country is Runnels County, TX, about 253 miles north. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Live Oak County, TX 28 mi east · 0% at surface
La Salle County, TX 32 mi west · 0% at surface
Atascosa County, TX 35 mi north · 0% at surface
Frio County, TX 46 mi northwest · 0% at surface
Duval County, TX 49 mi south · 0% at surface
Bee County, TX 51 mi east · 0% at surface

Against the rest of Texas

McMullen County ranks 209 of 254 in Texas for soluble rock at the surface, and sits above 0% of US counties on that measure.