Sinkhole risk in Jefferson 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 571 square miles, under one square mile of Jefferson County maps onto soluble rock. With about 36,107 residents (63 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 409 map points about 1.2 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 Jefferson County

The nearest county rated sinkhole country is Union County, IL, about 59 miles south. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Franklin County, IL 21 mi south · 0% at surface
Marion County, IL 24 mi north · 0% at surface
Hamilton County, IL 26 mi southeast · 0% at surface
Washington County, IL 27 mi west · 0% at surface
Wayne County, IL 28 mi east · 0% at surface
Perry County, IL 28 mi southwest · 0% at surface

Against the rest of Illinois

Jefferson County ranks 61 of 102 in Illinois for soluble rock at the surface, and sits above 0% of US counties on that measure.