Sinkhole risk in Madison 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 Madison County

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

Across 466 square miles, under one square mile of Madison County maps onto soluble rock. With about 13,877 residents (30 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 269 map points about 1.3 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 Madison County

The nearest county rated sinkhole country is Runnels County, TX, about 247 miles west. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Leon County, TX 23 mi north · 0% at surface
Walker County, TX 26 mi southeast · 0% at surface
Grimes County, TX 29 mi south · 0% at surface
Brazos County, TX 31 mi southwest · 0% at surface
Robertson County, TX 35 mi west · 0% at surface
Houston County, TX 39 mi northeast · 0% at surface

Against the rest of Texas

Madison County ranks 210 of 254 in Texas for soluble rock at the surface, and sits above 0% of US counties on that measure.