Grays Harbor County, WA Water Table Trend
Grays Harbor County's groundwater trend, from USGS's own readings
Grays Harbor County's long-term well puts the trend at 0.6 ft per decade, rising, getting shallower over time, based on 6 measurements since 1968.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Grays Harbor County's source well, in detail
Depth to water at the last reading was 16.1 ft below land surface. Readings span 1968-10-03 to 2017-06-28, 6 measurements from USGS well USGS-471825124151001 (21n/12w-18k01), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Grays Harbor County compares nationally
Grays Harbor County sits at rank 318th 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. Grays Harbor County, Washington is home to about 77,893 people. See the fastest-moving counties guide for how Grays Harbor 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 Grays Harbor 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.