Whitehorse Group:

While not a named aquifer in literature, the Whitehorse Group provides small but locally important amounts of groundwater in the area. The Whitehorse Group is a Permian formation occurring in beds of shale, sand, gypsum, anhydrite, and dolomite. It constitutes the remainder of the District not occupied by the Seymour and Blaine, generally located in the south and west portions of Hall County and the western part of Collingsworth County. It has many of the same characteristics as the Blaine Formation. Water quality is fair to poor, and well yields vary greatly. Principal use is for livestock water, with some irrigation use in Hall County. The Whitehorse comprises about fifty‐three percent of the land area of the District and provides approximately four percent of the irrigation water within the District.