Sinkhole risk in Zapata 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%

What to do about a house in Zapata County

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

Across 998 square miles, under one square mile of Zapata County maps onto soluble rock. With about 13,819 residents (14 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 261 map points about 2.0 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 Zapata County

The nearest county rated sinkhole country is Runnels County, TX, about 338 miles north. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Jim Hogg County, TX 27 mi east · 0% at surface
Starr County, TX 42 mi southeast · 0% at surface
Webb County, TX 54 mi north · 0% at surface
Brooks County, TX 60 mi east · 0% at surface
Duval County, TX 63 mi northeast · 0% at surface
Hidalgo County, TX 74 mi southeast · 0% at surface

Against the rest of Texas

Zapata County ranks 253 of 254 in Texas for soluble rock at the surface, and sits above 0% of US counties on that measure.