Plymouth County, MA Water Table Trend
Plymouth County's groundwater trend, from USGS's own readings
Plymouth County's representative monitoring well shows depth to water holding roughly steady, a fitted trend of 0.1 ft per decade over 70 years of readings.
One well stands in for Plymouth 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 25.3 ft below land surface. Readings span 1956-11-05 to 2026-08-25, 724 measurements from USGS well USGS-415453070434901 (Ma-Pww 22 Plymouth, Ma), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Plymouth County ranks
Of the 1,449 US counties with a usable trend, Plymouth County ranks 535th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 542,090 people live in Plymouth County, Massachusetts. See the fastest-moving counties guide for how Plymouth County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Plymouth 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.