Essex County, NY Water Table Trend
Essex County's groundwater trend, from USGS's own readings
Essex County's long-term well puts the trend at 0.1 ft per decade, holding roughly steady, based on 113 measurements since 2006.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Essex County's source well, in detail
Depth to water at the last reading was 18.5 ft below land surface. Readings span 2006-09-26 to 2026-10-14, 113 measurements from USGS well USGS-441644073315101 (Local Number, Ex-157, Near Lewis Ny), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Essex County compares nationally
Essex County sits at rank 718th 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. Essex County, New York is home to about 36,744 people. See the fastest-moving counties guide for how Essex 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 Essex 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.