Charles County, MD Water Table Trend
Charles County, MD: what the water table is actually doing
Charles County's representative monitoring well shows depth to water declining faster than most declining counties, a fitted trend of 18.2 ft per decade over 75 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Charles County's source well, in detail
Depth to water at the last reading was 287.1 ft below land surface. Readings span 1950-11-11 to 2025-08-20, 83 measurements from USGS well USGS-383217076590201 (Ch Ce 16), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Charles County compares nationally
Charles County sits at rank 1427th 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. Charles County, Maryland is home to about 174,478 people. See the fastest-moving counties guide for how Charles County stacks up against the most extreme cases nationally.
If you own a well in Charles County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Charles County, that trend is real, not assumed: 18.2 ft per decade over 75 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Charles 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.