Sauk County, WI Water Table Trend
Sauk County, WI: what the water table is actually doing
Over 85 years of USGS readings, the well tracking Sauk County's aquifer is rising, getting shallower over time: 1.4 ft per decade.
One well stands in for Sauk County's whole aquifer here, the honest simplification every page on this site carries.
What the well actually measured
The most recent reading put water 76.1 ft below land surface. Readings span 1942-01-01 to 2026-07-07, 100 measurements from USGS well USGS-432100089440001 (Sk-10/06e/02-0003), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Sauk County ranks
Of the 1,449 US counties with a usable trend, Sauk County ranks 176th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 66,486 people live in Sauk County, Wisconsin. See the fastest-moving counties guide for how Sauk County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Sauk County's water table is rising or falling is independent of what's actually in the water. Depletion can concentrate naturally-occurring minerals, so it's worth checking directly with a water test rather than assuming a depth trend says anything about quality.