Sinkhole risk in Portage County, OH: 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 487 square miles, under one square mile of Portage County maps onto soluble rock. With about 163,839 residents (336 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 399 map points about 1.1 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 Portage County

The nearest county rated sinkhole country is Monroe County, MI, about 129 miles northwest. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Summit County, OH 18 mi west · 0% at surface
Geauga County, OH 23 mi north · 0% at surface
Trumbull County, OH 24 mi northeast · 0% at surface
Mahoning County, OH 25 mi southeast · 0% at surface
Stark County, OH 26 mi south · 0% at surface
Cuyahoga County, OH 34 mi northwest · 0% at surface

Against the rest of Ohio

Portage County ranks 67 of 88 in Ohio for soluble rock at the surface, and sits above 0% of US counties on that measure.