Capitol Planning Region, CT Water Table Trend
Capitol Planning Region's groundwater trend, from USGS's own readings
Capitol Planning Region's long-term well puts the trend at 0.2 ft per decade, holding roughly steady, based on 1194 measurements since 1934.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Capitol Planning Region's source well, in detail
Depth to water at the last reading was 12.6 ft below land surface. Readings span 1934-10-01 to 2026-09-29, 1194 measurements from USGS well USGS-414910072372101 (Ct-Sw 64), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Capitol Planning Region compares nationally
Capitol Planning Region sits at rank 498th 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. Capitol Planning Region, Connecticut is home to about 991,508 people. See the fastest-moving counties guide for how Capitol Planning Region 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 Capitol Planning Region 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.