SinkholeOdds

Sinkhole risk in Greene County, NY: Mostly deep or small

Mostly deep or small

Some soluble rock, mostly deeply buried or in a small share of the county.

On soluble rock
4%
At or near the surface
0%
Buried under cover
4%

What this means before you buy

Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.

That works out to roughly 23 of Greene County's 647 square miles on soluble rock. With about 46,903 residents (72 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 277 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Greene County

The nearest county rated sinkhole country is Union County, PA, about 176 miles southwest. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Which formation it is

The largest mapped soluble unit here is the Onondaga Limestone (shale), Lower to Middle Devonian in age, covering about 2% of the county. Next is the Helderberg Group at 1%.

Against the rest of New York

Greene County ranks 23 of 62 in New York for soluble rock at the surface, and sits above 0% of US counties on that measure.