Sinkhole risk in Marion 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%

The next step for one property

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

Across 573 square miles, under one square mile of Marion County maps onto soluble rock. With about 36,437 residents (64 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 402 map points about 1.2 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 Marion County

The nearest county rated sinkhole country is Perry County, MO, about 81 miles southwest. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Jefferson County, IL 24 mi south · 0% at surface
Clay County, IL 25 mi east · 0% at surface
Fayette County, IL 25 mi north · 0% at surface
Clinton County, IL 27 mi west · 0% at surface
Wayne County, IL 30 mi southeast · 0% at surface
Bond County, IL 32 mi northwest · 0% at surface

Against the rest of Illinois

Marion County ranks 74 of 102 in Illinois for soluble rock at the surface, and sits above 0% of US counties on that measure.