Sinkhole risk in Solano County, CA: 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 822 square miles, under one square mile of Solano County maps onto soluble rock. With about 455,101 residents (554 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 240 map points about 1.9 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Solano County

The nearest county rated sinkhole country is Emery County, UT, about 607 miles east. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Contra Costa County, CA 24 mi south · 0% at surface
Napa County, CA 27 mi northwest · 2% at surface
Yolo County, CA 29 mi north · 0% at surface
Sacramento County, CA 35 mi east · 0% at surface
Alameda County, CA 43 mi south · 0% at surface
San Joaquin County, CA 43 mi southeast · 0% at surface

Against the rest of California

Solano County ranks 53 of 58 in California for soluble rock at the surface, and sits above 0% of US counties on that measure.