Hamilton County, OH Water Table Trend
Hamilton County's groundwater trend, from USGS's own readings
Hamilton County's long-term well puts the trend at 0.3 ft per decade, holding roughly steady, based on 138 measurements since 1965.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Hamilton County's source well, in detail
Depth to water at the last reading was 22.2 ft below land surface. Readings span 1965-10-01 to 2026-07-20, 138 measurements from USGS well OH015-391214084470100 (H-1 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 Hamilton County compares nationally
Hamilton County sits at rank 435th 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. Hamilton County, Ohio is home to about 837,359 people. See the fastest-moving counties guide for how Hamilton 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 Hamilton 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.