Delaware County, OH Water Table Trend
Delaware County's groundwater trend, from USGS's own readings
Over 56 years of USGS readings, the well tracking Delaware County's aquifer is declining, slower than most declining counties: 0.8 ft per decade.
One well stands in for Delaware 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 34.1 ft below land surface. Readings span 1970-06-01 to 2026-07-16, 34 measurements from USGS well OH015-402126083040400 (Dl-3 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 Delaware County ranks
Of the 1,449 US counties with a usable trend, Delaware County ranks 1046th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 237,966 people live in Delaware County, Ohio. See the fastest-moving counties guide for how Delaware County stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Delaware 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 Delaware 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.