Sussex County, NJ Water Table Trend
Sussex County, NJ: what the water table is actually doing
Over 38 years of USGS readings, the well tracking Sussex County's aquifer is holding roughly steady: 0.1 ft per decade.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Sussex County's source well, in detail
Depth to water at the last reading was 23.1 ft below land surface. Readings span 1988-06-03 to 2026-09-18, 243 measurements from USGS well USGS-410914074540401 (370202-- Taylor Obs), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Sussex County compares nationally
Sussex County sits at rank 714th 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. Sussex County, New Jersey is home to about 147,444 people. See the fastest-moving counties guide for how Sussex 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 Sussex 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.