Sinkhole risk in Coos County, NH: 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 1,795 square miles, under one square mile of Coos County maps onto soluble rock. With about 31,094 residents (17 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 604 map points about 1.7 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 Coos County

The nearest county rated sinkhole country is Union County, PA, about 388 miles southwest. 1 of the 6 closest counties land in the same band; the ground changes quickly around here.

Essex County, VT 22 mi west · 0% at surface
Oxford County, ME 29 mi east · 0% at surface
Caledonia County, VT 42 mi west · 0% at surface
Franklin County, ME 48 mi northeast · 0% at surface
Orleans County, VT 49 mi west · under 1% at surface
Carroll County, NH 54 mi south · 0% at surface

Against the rest of New Hampshire

Coos County ranks 4 of 10 in New Hampshire for soluble rock at the surface, and sits above 0% of US counties on that measure.