Union Parish, LA Water Table Trend
Union Parish, LA: what the water table is actually doing
Union Parish's long-term well puts the trend at 7.1 ft per decade, declining faster than most declining counties, based on 1095 measurements since 1956.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Union Parish's source well, in detail
Depth to water at the last reading was 186.4 ft below land surface. Readings span 1956-01-01 to 2026-10-07, 1095 measurements from USGS well USGS-324417092090001 (Un-26), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Union Parish compares nationally
Union Parish sits at rank 1354th 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. Union Parish, Louisiana is home to about 20,617 people. See the fastest-moving counties guide for how Union Parish stacks up against the most extreme cases nationally.
If you own a well in Union Parish
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Union Parish, that trend is real, not assumed: 7.1 ft per decade over 71 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Union 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.