Sinkhole risk in Jerome County, ID: Not karst, but voids possible

Not karst, but voids possible

No soluble bedrock; some pseudokarst (piping or lava-tube ground).

On soluble rock: 0%
At or near the surface: 0%
Buried under cover: 0%

What to do about a house in Jerome County

Not true karst, but soil piping or lava tubes can still open voids - mention it to an inspector.

Across 598 square miles, under one square mile of Jerome County maps onto soluble rock. With about 26,056 residents (44 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 289 map points about 1.4 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Jerome County

The nearest county rated sinkhole country is Emery County, UT, about 315 miles southeast. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Lincoln County, ID 21 mi north · 0% at surface
Twin Falls County, ID 31 mi southwest · under 1% at surface
Minidoka County, ID 34 mi east · 0% at surface
Gooding County, ID 34 mi northwest · 0% at surface
Cassia County, ID 43 mi southeast · 7% at surface
Blaine County, ID 51 mi north · 16% at surface

Against the rest of Idaho

Jerome County ranks 37 of 44 in Idaho for soluble rock at the surface, and sits above 0% of US counties on that measure.