Sinkhole risk in Swisher County, TX: Not karst, but voids possible

Not karst, but voids possible

No soluble bedrock; some pseudokarst (piping or lava-tube ground).

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

The next step for one property

Not true karst, but soil piping or lava tubes can still open voids - mention it to an inspector.

Across 890 square miles, under one square mile of Swisher County maps onto soluble rock. With about 6,877 residents (8 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 1.5 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Swisher County

The nearest county rated sinkhole country is Briscoe County, TX, about 31 miles east, close enough that the same rock may run under the county line. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Castro County, TX 29 mi west · 0% at surface
Briscoe County, TX 31 mi east · 42% at surface
Randall County, TX 31 mi north · 3% at surface
Hale County, TX 32 mi south · 0% at surface
Armstrong County, TX 37 mi northeast · 27% at surface
Floyd County, TX 40 mi southeast · 6% at surface

Against the rest of Texas

Swisher County ranks 237 of 254 in Texas for soluble rock at the surface, and sits above 0% of US counties on that measure.