St. Helena Parish, LA Water Table Trend
Is the water table dropping in St. Helena Parish, LA?
Over 43 years of USGS readings, the well tracking St. Helena Parish's aquifer is rising, getting shallower over time: 1 ft per decade.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
St. Helena Parish's source well, in detail
Depth to water at the last reading was 45.5 ft below land surface. Readings span 1983-10-14 to 2026-05-12, 50 measurements from USGS well USGS-304213090434301 (Sh-41), 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. Helena Parish compares nationally
St. Helena Parish sits at rank 250th 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. Helena Parish, Louisiana is home to about 10,857 people. See the fastest-moving counties guide for how St. Helena 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. Helena 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.