Roberts County, SD Water Table Trend
Roberts County, SD: what the water table is actually doing
Over 49 years of USGS readings, the well tracking Roberts County's aquifer is rising, getting shallower over time: 1.2 ft per decade.
One well stands in for Roberts 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 12.6 ft below land surface. Readings span 1977-11-30 to 2026-10-07, 247 measurements from USGS well USGS-452304097083901 (122n52w 2bbbb R (Sisseton Gw Well Rb-77t)), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Roberts County ranks
Of the 1,449 US counties with a usable trend, Roberts County ranks 218th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 10,283 people live in Roberts County, South Dakota. See the fastest-moving counties guide for how Roberts County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Roberts 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.