Posey County, IN Water Table Trend
Posey County, IN: what the water table is actually doing
Posey County's long-term well puts the trend at 0.3 ft per decade, holding roughly steady, based on 285 measurements since 1971.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Posey County's source well, in detail
Depth to water at the last reading was 15.2 ft below land surface. Readings span 1971-09-23 to 2026-06-24, 285 measurements from USGS well USGS-380758087551001 (Posey 3 (Py 3)), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Posey County compares nationally
Posey County sits at rank 443rd 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. Posey County, Indiana is home to about 25,067 people. See the fastest-moving counties guide for how Posey 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 Posey 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.