Sinkhole risk in Sacramento 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 to do about a house in Sacramento County

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

Across 965 square miles, under one square mile of Sacramento County maps onto soluble rock. With about 1,611,231 residents (1,669 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 460 map points about 1.4 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 Sacramento County

The nearest county rated sinkhole country is Emery County, UT, about 574 miles east. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Yolo County, CA 34 mi northwest · 0% at surface
Solano County, CA 35 mi west · 0% at surface
San Joaquin County, CA 36 mi south · 0% at surface
Amador County, CA 37 mi east · 0% at surface
Sutter County, CA 45 mi northwest · 0% at surface
Calaveras County, CA 46 mi east · under 1% at surface

Against the rest of California

Sacramento County ranks 47 of 58 in California for soluble rock at the surface, and sits above 0% of US counties on that measure.