Spokane County, WA Water Table Trend
Spokane County's groundwater trend, from USGS's own readings
Spokane County's representative monitoring well shows depth to water rising, getting shallower over time, a fitted trend of 0.7 ft per decade over 105 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Spokane County's source well, in detail
Depth to water at the last reading was 101 ft below land surface. Readings span 1921-11-01 to 2026-08-03, 1486 measurements from USGS well USGS-474011117072901 (25n/45e-16c01), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Spokane County compares nationally
Spokane County sits at rank 311th 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. Spokane County, Washington is home to about 555,947 people. See the fastest-moving counties guide for how Spokane 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 Spokane 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.