Galveston County, TX Water Table Trend
Galveston County's groundwater trend, from USGS's own readings
Galveston County's representative monitoring well shows depth to water rising, getting shallower over time, a fitted trend of 0.9 ft per decade over 85 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Galveston County's source well, in detail
Depth to water at the last reading was 97.1 ft below land surface. Readings span 1941-01-01 to 2026-01-14, 983 measurements from USGS well USGS-292338095063601 (Kh-65-40-707 (Galveston)), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Galveston County compares nationally
Galveston County sits at rank 259th 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. Galveston County, Texas is home to about 367,407 people. See the fastest-moving counties guide for how Galveston 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 Galveston 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.