St. Joseph County, IN Water Table Trend
St. Joseph County's groundwater trend, from USGS's own readings
Over 36 years of USGS readings, the well tracking St. Joseph County's aquifer is holding roughly steady: 0.2 ft per decade.
One well stands in for St. Joseph 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 3.7 ft below land surface. Readings span 1991-01-25 to 2026-07-15, 37 measurements from USGS well USGS-413912086074401 (Usgs Well 39-25 At Mishawaka, In), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where St. Joseph County ranks
Of the 1,449 US counties with a usable trend, St. Joseph County ranks 841st from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 273,744 people live in St. Joseph County, Indiana. See the fastest-moving counties guide for how St. Joseph County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether St. Joseph 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.