Hamilton County, IN Water Table Trend
Hamilton County, IN: what the water table is actually doing
Hamilton County's long-term well puts the trend at 0.3 ft per decade, holding roughly steady, based on 88 measurements since 1974.
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 13.2 ft below land surface. Readings span 1974-09-25 to 2026-09-24, 88 measurements from USGS well USGS-395628086052901 (Usgs Well Car-4 At Carmel, In), 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 890th 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, Indiana is home to about 379,704 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.