Sinkhole risk in Parmer 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%

What to do about a house in Parmer County

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

Across 881 square miles, under one square mile of Parmer County maps onto soluble rock. With about 9,669 residents (11 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 Parmer County

The nearest county rated sinkhole country is Briscoe County, TX, about 90 miles east. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Castro County, TX 30 mi east · 0% at surface
Deaf Smith County, TX 30 mi north · under 1% at surface
Curry County, NM 32 mi west · 0% at surface
Bailey County, TX 32 mi south · 0% at surface
Lamb County, TX 41 mi southeast · 0% at surface
Roosevelt County, NM 53 mi southwest · 0% at surface

Against the rest of Texas

Parmer County ranks 221 of 254 in Texas for soluble rock at the surface, and sits above 0% of US counties on that measure.