Fond du Lac County, WI Water Table Trend
Fond du Lac County's groundwater trend, from USGS's own readings
Fond du Lac County's long-term well puts the trend at 4.4 ft per decade, rising, getting shallower over time, based on 132 measurements since 1985.
One well stands in for Fond du Lac 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 75.5 ft below land surface. Readings span 1985-08-08 to 2026-10-19, 132 measurements from USGS well USGS-434231088311801 (Fl-14/17e/06-0659), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Fond du Lac County ranks
Of the 1,449 US counties with a usable trend, Fond du Lac County ranks 61st from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 104,269 people live in Fond du Lac County, Wisconsin. See the fastest-moving counties guide for how Fond du Lac County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Fond du Lac 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.