Sinkhole risk in Hidalgo 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 this means before you buy

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

Across 1,571 square miles, under one square mile of Hidalgo County maps onto soluble rock. With about 914,820 residents (582 per square mile), most of the county is built up, so a mapped unit is likely to sit under somebody's street. The figures come from 280 map points about 2.4 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why gypsum and salt move faster than limestone, and how these percentages are measured.

Counties around Hidalgo County

The nearest county rated sinkhole country is Runnels County, TX, about 392 miles north. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Starr County, TX 36 mi west · 0% at surface
Willacy County, TX 37 mi east · 0% at surface
Brooks County, TX 44 mi north · 0% at surface
Cameron County, TX 48 mi southeast · 0% at surface
Kenedy County, TX 50 mi northeast · 0% at surface
Jim Hogg County, TX 57 mi northwest · 0% at surface

Against the rest of Texas

Hidalgo County ranks 190 of 254 in Texas for soluble rock at the surface, and sits above 0% of US counties on that measure.