St. John the Baptist Parish, LA Water Table Trend
Is the water table dropping in St. John the Baptist Parish, LA?
Over 64 years of USGS readings, the well tracking St. John the Baptist Parish's aquifer is rising, getting shallower over time: 1.2 ft per decade.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
St. John the Baptist Parish's source well, in detail
Depth to water at the last reading was 13 ft below land surface. Readings span 1962-08-17 to 2026-10-07, 781 measurements from USGS well USGS-300234090390301 (Sjb-145), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How St. John the Baptist Parish compares nationally
St. John the Baptist Parish sits at rank 221st 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. St. John the Baptist Parish, Louisiana is home to about 39,694 people. See the fastest-moving counties guide for how St. John the Baptist Parish 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 St. John the Baptist Parish 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.