Seneca County, OH Water Table Trend
Is the water table dropping in Seneca County, OH?
Seneca County's representative monitoring well shows depth to water declining, slower than most declining counties, a fitted trend of 0.6 ft per decade over 56 years of readings.
One well stands in for Seneca 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 20.3 ft below land surface. Readings span 1970-03-19 to 2026-07-13, 67 measurements from USGS well OH015-410802083093900 (Se-2 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 Seneca County ranks
Of the 1,449 US counties with a usable trend, Seneca County ranks 978th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 54,730 people live in Seneca County, Ohio. See the fastest-moving counties guide for how Seneca County stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Seneca 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 Seneca 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.