Minnehaha County, SD Water Table Trend
Is the water table dropping in Minnehaha County, SD?
Minnehaha County's long-term well puts the trend at 0.1 ft per decade, holding roughly steady, based on 312 measurements since 1980.
One well stands in for Minnehaha 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 7.6 ft below land surface. Readings span 1980-10-06 to 2026-07-13, 312 measurements from USGS well USGS-434330096434801 (103n49w16bccc Baltic), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Minnehaha County ranks
Of the 1,449 US counties with a usable trend, Minnehaha County ranks 746th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 208,639 people live in Minnehaha County, South Dakota. See the fastest-moving counties guide for how Minnehaha County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Minnehaha 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.