Baltimore city, MD Water Table Trend
Baltimore city, MD: what the water table is actually doing
Baltimore city's long-term well puts the trend at 7 ft per decade, rising, getting shallower over time, based on 750 measurements since 1934.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Baltimore city's source well, in detail
Depth to water at the last reading was 21.6 ft below land surface. Readings span 1934-02-03 to 2026-08-18, 750 measurements from USGS well USGS-391617076322001 (2s5e- 1), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Baltimore city compares nationally
Baltimore city sits at rank 40th 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. Baltimore city, Maryland is home to about 568,271 people. See the fastest-moving counties guide for how Baltimore city 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 Baltimore city 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.