Middlesex County, MA Water Table Trend
Is the water table dropping in Middlesex County, MA?
Middlesex County's representative monitoring well shows depth to water holding roughly steady, a fitted trend of 0 ft per decade over 86 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Middlesex County's source well, in detail
Depth to water at the last reading was 13.6 ft below land surface. Readings span 1940-06-01 to 2026-09-18, 1033 measurements from USGS well USGS-422819071065701 (Ma-Xow 14 Winchester, Ma), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Middlesex County compares nationally
Middlesex County sits at rank 635th of 1,449 ranked counties, ordered rising-to-declining, so a low number means a rising water table and a high one means fast decline. Middlesex County, Massachusetts is home to about 1,668,956 people. See the fastest-moving counties guide for how Middlesex County stacks up against the most extreme cases nationally.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Middlesex County can be stable in depth and still worth testing for quality, or declining and still test clean, the two are measured separately, and only a direct test settles the second one.