Douglas County, CO Water Table Trend
Douglas County's groundwater trend, from USGS's own readings
Douglas County's representative monitoring well shows depth to water declining faster than most declining counties, a fitted trend of 10.1 ft per decade over 18 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Douglas County's source well, in detail
Depth to water at the last reading was 116.1 ft below land surface. Readings span 2009-01-10 to 2026-09-17, 74 measurements from USGS well USGS-393245104493401 (Sc00606607bcab Grndaw6), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Douglas County compares nationally
Douglas County sits at rank 1390th 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. Douglas County, Colorado is home to about 393,995 people. See the fastest-moving counties guide for how Douglas County stacks up against the most extreme cases nationally.
If you own a well in Douglas County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Douglas County, that trend is real, not assumed: 10.1 ft per decade over 18 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Douglas 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.