Grand County, UT Water Table Trend
Grand County's groundwater trend, from USGS's own readings
Grand County's representative monitoring well shows depth to water declining at a typical pace for a declining county, a fitted trend of 2.1 ft per decade over 90 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Grand County's source well, in detail
Depth to water at the last reading was 23 ft below land surface. Readings span 1935-11-11 to 2026-03-24, 76 measurements from USGS well USGS-384251109420101 ((D-24-20)22bac- 2), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Grand County compares nationally
Grand County sits at rank 1190th 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. Grand County, Utah is home to about 9,788 people. See the fastest-moving counties guide for how Grand County stacks up against the most extreme cases nationally.
If you own a well in Grand County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Grand County, that trend is real, not assumed: 2.1 ft per decade over 90 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Grand 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.