Ozaukee County, WI Water Table Trend
Ozaukee County's groundwater trend, from USGS's own readings
Over 31 years of USGS readings, the well tracking Ozaukee County's aquifer is declining, slower than most declining counties: 0.9 ft per decade.
One well stands in for Ozaukee 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 10.2 ft below land surface. Readings span 1995-02-20 to 2026-06-26, 7 measurements from USGS well USGS-433215088010001 (Oz-12/21e/05-0582), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Ozaukee County ranks
Of the 1,449 US counties with a usable trend, Ozaukee County ranks 1066th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 93,956 people live in Ozaukee County, Wisconsin. See the fastest-moving counties guide for how Ozaukee County stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Ozaukee County's water table is actually declining, not just a general worry, a well owner here should consider comparing home-warranty plans that cover well-pump failure before one happens.
A dropping table says nothing about water quality
Whether Ozaukee 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.