Foster County, ND Water Table Trend
Foster County's groundwater trend, from USGS's own readings
Foster County's long-term well puts the trend at 1.2 ft per decade, rising, getting shallower over time, based on 222 measurements since 1991.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Foster County's source well, in detail
Depth to water at the last reading was 18.5 ft below land surface. Readings span 1991-05-29 to 2021-03-26, 222 measurements from USGS well USGS-473051099093601 (147-067-35aaa), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Foster County compares nationally
Foster County sits at rank 212th 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. Foster County, North Dakota is home to about 3,323 people. See the fastest-moving counties guide for how Foster County 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 Foster 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.