Clinton County, IA Water Table Trend
Clinton County, IA: what the water table is actually doing
Over 28 years of USGS readings, the well tracking Clinton County's aquifer is holding roughly steady: 0.4 ft per decade.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Clinton County's source well, in detail
Depth to water at the last reading was 3.6 ft below land surface. Readings span 1997-06-12 to 2025-06-11, 10 measurements from USGS well USGS-414958090230301 (081n05e09cad 1997nawqa), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Clinton County compares nationally
Clinton County sits at rank 375th 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. Clinton County, Iowa is home to about 46,015 people. See the fastest-moving counties guide for how Clinton 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 Clinton 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.