Williams County, OH Water Table Trend
Williams County, OH: what the water table is actually doing
Over 57 years of USGS readings, the well tracking Williams County's aquifer is holding roughly steady: 0.2 ft per decade.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Williams County's source well, in detail
Depth to water at the last reading was 10.5 ft below land surface. Readings span 1969-08-01 to 2026-01-14, 209 measurements from USGS well OH015-413108084415300 (Wm-12 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 Williams County compares nationally
Williams County sits at rank 802nd 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. Williams County, Ohio is home to about 36,554 people. See the fastest-moving counties guide for how Williams 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 Williams 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.