Hydrologic Atlas maps are available for each county or portion of a county within the High Plains Underground Water Conservation District's 16-county service area.
These maps have been updated to reflect 2011-2012 groundwater conditions.
Each atlas contains the same four maps as the previous print version. These include the approximate altitude of the land surface, approximate altitude of the base of the Ogallala Formation, approximate saturated thickness of the Ogallala Formation, and the approximate altitude of the water table in the Ogallala Formation.