Mercer County, NJ Water Table Trend
Mercer County's groundwater trend, from USGS's own readings
Mercer County's long-term well puts the trend at 0.4 ft per decade, holding roughly steady, based on 11 measurements since 1947.
One well stands in for Mercer 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 27.3 ft below land surface. Readings span 1947-10-01 to 2023-10-02, 11 measurements from USGS well USGS-401622074313301 (210084-- Hightstown Pw 2), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Mercer County ranks
Of the 1,449 US counties with a usable trend, Mercer County ranks 414th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 392,138 people live in Mercer County, New Jersey. See the fastest-moving counties guide for how Mercer County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Mercer 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.