San Miguel County, NM Water Table Trend
San Miguel County's groundwater trend, from USGS's own readings
Over 32 years of USGS readings, the well tracking San Miguel County's aquifer is declining at a typical pace for a declining county: 1.4 ft per decade.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
San Miguel County's source well, in detail
Depth to water at the last reading was 9.1 ft below land surface. Readings span 1994-05-11 to 2026-02-12, 9 measurements from USGS well USGS-354811105252301 (18n.14e.11.22413 13), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How San Miguel County compares nationally
San Miguel County sits at rank 1135th 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. San Miguel County, New Mexico is home to about 26,428 people. See the fastest-moving counties guide for how San Miguel County stacks up against the most extreme cases nationally.
If you own a well in San Miguel County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In San Miguel County, that trend is real, not assumed: 1.4 ft per decade over 32 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in San Miguel 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.