Jerome County, ID Water Table Trend
Jerome County's groundwater trend, from USGS's own readings
Over 89 years of USGS readings, the well tracking Jerome County's aquifer is declining faster than most declining counties: 5.1 ft per decade.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Jerome County's source well, in detail
Depth to water at the last reading was 241.8 ft below land surface. Readings span 1929-07-27 to 2018-04-03, 35 measurements from USGS well USGS-423950114173501 (09s 18e 12abb1), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Jerome County compares nationally
Jerome County sits at rank 1307th 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. Jerome County, Idaho is home to about 26,056 people. See the fastest-moving counties guide for how Jerome County stacks up against the most extreme cases nationally.
If you own a well in Jerome County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Jerome County, that trend is real, not assumed: 5.1 ft per decade over 89 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Jerome County 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.