Sullivan County, PA Water Table Trend
Sullivan County, PA: what the water table is actually doing
Sullivan County's long-term well puts the trend at 0 ft per decade, holding roughly steady, based on 259 measurements since 1965.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Sullivan County's source well, in detail
Depth to water at the last reading was 28 ft below land surface. Readings span 1965-03-01 to 2026-09-24, 259 measurements from USGS well USGS-413026076352901 (Su 34 Sullivan County Observation Well), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Sullivan County compares nationally
Sullivan County sits at rank 649th 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. Sullivan County, Pennsylvania is home to about 5,927 people. See the fastest-moving counties guide for how Sullivan 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 Sullivan 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.