Porter County, IN Water Table Trend
Is the water table dropping in Porter County, IN?
Porter County's representative monitoring well shows depth to water holding roughly steady, a fitted trend of 0.1 ft per decade over 25 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Porter County's source well, in detail
Depth to water at the last reading was 20.2 ft below land surface. Readings span 2001-10-11 to 2026-07-29, 70 measurements from USGS well USGS-413717087123501 (Usgs Well E-2 At Indiana Dunes National Lakeshore), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Porter County compares nationally
Porter County sits at rank 761st 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. Porter County, Indiana is home to about 175,860 people. See the fastest-moving counties guide for how Porter 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 Porter 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.