Gallia County, OH Water Table Trend
Gallia County's groundwater trend, from USGS's own readings
Over 51 years of USGS readings, the well tracking Gallia 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.
Gallia County's source well, in detail
Depth to water at the last reading was 32.6 ft below land surface. Readings span 1975-06-17 to 2026-07-06, 143 measurements from USGS well OH015-383638082103300 (G-2 Oh), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Gallia County compares nationally
Gallia County sits at rank 749th 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. Gallia County, Ohio is home to about 28,886 people. See the fastest-moving counties guide for how Gallia 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 Gallia 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.