Sinkhole risk in Sangamon County, IL: 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 868 square miles, under one square mile of Sangamon County maps onto soluble rock. With about 194,345 residents (224 per square mile), homes are spread across towns and farmland, and a mapped unit may or may not reach the developed parts. The figures come from 266 map points about 1.8 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Sangamon County

The nearest county rated sinkhole country is Calhoun County, IL, about 67 miles southwest. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Menard County, IL 20 mi north · 0% at surface
Christian County, IL 25 mi southeast · 0% at surface
Morgan County, IL 29 mi west · 0% at surface
Logan County, IL 30 mi northeast · 0% at surface
Cass County, IL 34 mi northwest · 0% at surface
Mason County, IL 36 mi north · 0% at surface

Against the rest of Illinois

Sangamon County ranks 89 of 102 in Illinois for soluble rock at the surface, and sits above 0% of US counties on that measure.