Clark County, NV Water Table Trend
Clark County's groundwater trend, from USGS's own readings
Clark County's representative monitoring well shows depth to water declining faster than most declining counties, a fitted trend of 12.1 ft per decade over 88 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Clark County's source well, in detail
Depth to water at the last reading was 105.4 ft below land surface. Readings span 1938-08-14 to 2026-05-15, 3381 measurements from USGS well USGS-360349115100001 (212 S22 E61 04bcb 1 (M Fitz)), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Clark County compares nationally
Clark County sits at rank 1410th 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. Clark County, Nevada is home to about 2,398,871 people. See the fastest-moving counties guide for how Clark County stacks up against the most extreme cases nationally.
If you own a well in Clark County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Clark County, that trend is real, not assumed: 12.1 ft per decade over 88 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Clark 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.