San Juan County, NM Water Table Trend
San Juan County's groundwater trend, from USGS's own readings
San Juan County's representative monitoring well shows depth to water rising, getting shallower over time, a fitted trend of 2.7 ft per decade over 73 years of readings.
One well stands in for San Juan County's whole aquifer here, the honest simplification every page on this site carries.
What the well actually measured
The most recent reading put water 258 ft below land surface. Readings span 1953-09-04 to 2026-03-04, 26 measurements from USGS well USGS-361833108193801 (Nr048.0429x1311 682), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where San Juan County ranks
Of the 1,449 US counties with a usable trend, San Juan County ranks 101st from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 120,817 people live in San Juan County, New Mexico. See the fastest-moving counties guide for how San Juan County stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether San Juan County's water table is rising or falling is independent of what's actually in the water. Depletion can concentrate naturally-occurring minerals, so it's worth checking directly with a water test rather than assuming a depth trend says anything about quality.