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Rush Springs

The Rush Springs aquifer, located primarily in western Oklahoma, is comprised of the Permian-age Rush Springs and Marlow Formations. The Rush Springs Formation is a massive fine-grained poorly cemented sandstone with some interbedded dolomite, gypsum, and shale. The Marlow Formation is composed of interbedded sandstones, siltstones, mudstones, gypsum-anhydrite, and dolomite.

Aquifer thickness ranges from less than 200 feet in the south to about 330 feet in northern areas and is generally less than 250 feet thick through the central part of the aquifer. Water from the Rush Springs aquifer tends to be very hard yet suitable for most uses. Levels of dissolved solids are generally less than 500 mg/L. Nitrate, sulfate, and arsenic concentrations exceed drinking water standards in some areas, limiting its use for drinking water.

The aquifer is used primarily for irrigation, but it also supplies water for industrial, municipal, and domestic use. Most groundwater withdrawn from the Rush Springs aquifer is in Caddo County. Wells commonly yield 25 to 400 gpm while some irrigation wells are reported to exceed 1,000 gpm.


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