Sinkhole risk in Middlesex County, MA: 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 to do about a house in Middlesex County

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 818 square miles, under one square mile of Middlesex County maps onto soluble rock. With about 1,668,956 residents (2,041 per square mile), most of the county is built up, so a mapped unit is likely to sit under somebody's street. The figures come from 477 map points about 1.3 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Middlesex County

The nearest county rated sinkhole country is Union County, PA, about 310 miles west. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Suffolk County, MA 22 mi southeast · 0% at surface
Norfolk County, MA 24 mi southeast · 0% at surface
Essex County, MA 29 mi northeast · 0% at surface
Worcester County, MA 30 mi southwest · 0% at surface
Hillsborough County, NH 34 mi northwest · 0% at surface
Rockingham County, NH 38 mi northeast · 0% at surface

Against the rest of Massachusetts

Middlesex County ranks 9 of 14 in Massachusetts for soluble rock at the surface, and sits above 0% of US counties on that measure.