Louisa County, IA Water Table Trend
Louisa County, IA: what the water table is actually doing
Louisa County's representative monitoring well shows depth to water holding roughly steady, a fitted trend of 0.1 ft per decade over 28 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Louisa County's source well, in detail
Depth to water at the last reading was 10.7 ft below land surface. Readings span 1997-06-24 to 2025-06-11, 14 measurements from USGS well USGS-411511091155101 (075n04w36dbc 1997nawqa Louisa County), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Louisa County compares nationally
Louisa County sits at rank 602nd 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. Louisa County, Iowa is home to about 10,630 people. See the fastest-moving counties guide for how Louisa 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 Louisa 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.