Barnstable County, MA Water Table Trend
Barnstable County's groundwater trend, from USGS's own readings
Over 64 years of USGS readings, the well tracking Barnstable County's aquifer is holding roughly steady: 0 ft per decade.
One well stands in for Barnstable 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 12.1 ft below land surface. Readings span 1962-10-30 to 2026-07-15, 766 measurements from USGS well USGS-414518070015801 (Ma-Bmw 21r Brewster, 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 Barnstable County ranks
Of the 1,449 US counties with a usable trend, Barnstable County ranks 651st from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 232,570 people live in Barnstable County, Massachusetts. See the fastest-moving counties guide for how Barnstable County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Barnstable 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.