Inyo County, CA Water Table Trend
Inyo County's groundwater trend, from USGS's own readings
Inyo County's long-term well puts the trend at 0.6 ft per decade, rising, getting shallower over time, based on 311 measurements since 1979.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Inyo County's source well, in detail
Depth to water at the last reading was 3.4 ft below land surface. Readings span 1979-01-22 to 2021-09-21, 311 measurements from USGS well USGS-361817116244701 (230 025n005e14m001s Death Valley Jct (Ad-14)), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Inyo County compares nationally
Inyo County sits at rank 333rd 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. Inyo County, California is home to about 18,485 people. See the fastest-moving counties guide for how Inyo County stacks up against the most extreme cases nationally.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Inyo 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.