Sinkhole risk in Capitol Planning Region, CT: No soluble rock mapped

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 1,027 square miles, under one square mile of Capitol Planning Region maps onto soluble rock. With about 991,508 residents (965 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 307 map points about 1.8 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 Capitol Planning Region

The nearest county rated sinkhole country is Union County, PA, about 240 miles west. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

• Hampden County, MA 22 mi north · 0% at surface
• Lower Connecticut River Valley Planning Region, CT 28 mi south · 0% at surface
• Northeastern Connecticut Planning Region, CT 31 mi east · 0% at surface
• Northwest Hills Planning Region, CT 33 mi west · 0% at surface
• Naugatuck Valley Planning Region, CT 34 mi southwest · 0% at surface
• Southeastern Connecticut Planning Region, CT 34 mi southeast · 0% at surface

Against the rest of Connecticut

Capitol Planning Region ranks 1 of 9 in Connecticut for soluble rock at the surface, and sits above 0% of US counties on that measure.

• Greater Bridgeport Planning Region 0%
• Lower Connecticut River Valley Planning Region 0%
• Naugatuck Valley Planning Region 0%
• Northeastern Connecticut Planning Region 0%
• Northwest Hills Planning Region 0%