Doña Ana County, NM Water Table Trend
Doña Ana County's groundwater trend, from USGS's own readings
Over 80 years of USGS readings, the well tracking Doña Ana 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.
Doña Ana County's source well, in detail
Depth to water at the last reading was 0 ft below land surface. Readings span 1946-01-01 to 2026-01-28, 28 measurements from USGS well USGS-315953106391501 (Mbown-140 - 26s.03e.32.441 (Usbr-39)), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Doña Ana County compares nationally
Doña Ana County sits at rank 1134th 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. Doña Ana County, New Mexico is home to about 229,366 people. See the fastest-moving counties guide for how Doña Ana County stacks up against the most extreme cases nationally.
If you own a well in Doña Ana County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Doña Ana County, that trend is real, not assumed: 1.4 ft per decade over 80 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Doña Ana 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.