Cass County, MN Water Table Trend
Cass County's groundwater trend, from USGS's own readings
Cass County's representative monitoring well shows depth to water holding roughly steady, a fitted trend of 0.3 ft per decade over 32 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Cass County's source well, in detail
Depth to water at the last reading was 8 ft below land surface. Readings span 1986-09-18 to 2018-08-01, 20 measurements from USGS well USGS-471546094331700 (Flus-01 144n31w25bbdc 01), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Cass County compares nationally
Cass County sits at rank 850th 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. Cass County, Minnesota is home to about 31,442 people. See the fastest-moving counties guide for how Cass 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 Cass 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.