Sinkhole risk in Anderson 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 Anderson County

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

Across 1,063 square miles, under one square mile of Anderson County maps onto soluble rock. With about 59,512 residents (56 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 581 map points about 1.4 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Anderson County

The nearest county rated sinkhole country is Baylor County, TX, about 240 miles northwest. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Henderson County, TX 28 mi northwest · 0% at surface
Cherokee County, TX 30 mi east · 0% at surface
Freestone County, TX 30 mi west · under 1% at surface
Houston County, TX 38 mi south · 0% at surface
Leon County, TX 42 mi southwest · 0% at surface
Smith County, TX 43 mi northeast · 0% at surface

Against the rest of Texas

Anderson County ranks 148 of 254 in Texas for soluble rock at the surface, and sits above 0% of US counties on that measure.