Sinkhole risk in Rockingham 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 696 square miles, under one square mile of Rockingham County maps onto soluble rock. With about 322,433 residents (464 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 531 map points about 1.1 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Rockingham County

The nearest county rated sinkhole country is Union County, PA, about 336 miles southwest. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Strafford County, NH 21 mi north · 0% at surface
Essex County, MA 27 mi southeast · 0% at surface
Hillsborough County, NH 32 mi west · 0% at surface
Merrimack County, NH 36 mi northwest · 0% at surface
York County, ME 37 mi northeast · 0% at surface
Middlesex County, MA 38 mi southwest · 0% at surface

Against the rest of New Hampshire

Rockingham County ranks 8 of 10 in New Hampshire for soluble rock at the surface, and sits above 0% of US counties on that measure.