Clark County, OH Water Table Trend
Clark County, OH: what the water table is actually doing
Clark County's long-term well puts the trend at 2.3 ft per decade, rising, getting shallower over time, based on 63 measurements since 1964.
One well stands in for Clark 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 11.6 ft below land surface. Readings span 1964-03-03 to 2026-07-27, 63 measurements from USGS well OH015-395840083495200 (Cl-7 Oh), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Clark County ranks
Of the 1,449 US counties with a usable trend, Clark County ranks 114th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 134,985 people live in Clark County, Ohio. See the fastest-moving counties guide for how Clark County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Clark 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.