Sinkhole risk in Yuma County, AZ: 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%

The next step for one property

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

Across 5,514 square miles, under one square mile of Yuma County maps onto soluble rock. With about 220,310 residents (40 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 252 map points about 4.7 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: why gypsum and salt move faster than limestone, and how ground with no limestone still opens up.

Counties around Yuma County

The nearest county rated sinkhole country is Emery County, UT, about 466 miles north. 1 of the 6 closest counties land in the same band; the ground changes quickly around here.

La Paz County, AZ 66 mi north · 0% at surface
Imperial County, CA 86 mi west · 0% at surface
Maricopa County, AZ 91 mi northeast · 0% at surface
Pima County, AZ 132 mi east · under 1% at surface
Riverside County, CA 138 mi northwest · under 1% at surface
Pinal County, AZ 148 mi east · 3% at surface

Against the rest of Arizona

Yuma County ranks 15 of 15 in Arizona for soluble rock at the surface, and sits above 0% of US counties on that measure.