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<br />some isolated problems and costs associated with these uses. Potential <br />industrial and domestic benefits from salinity control are estimated to be $2 <br />million per year. 1mpair.ment of wildlife and livestock watering is indicated <br />in some reaches due to high chloride, sulfate, and TDS concentrations. <br />Impair.ment of public water supplies is indicated in several reaches due to <br />sulfate concentration. <br /> <br />.... <br />-.1 <br />~ <br />"'l <br /> <br />The state of wyoming is a member of the Colorado River Salinity Control <br />Forum and is seeking reduced salinity levels through (1) the Big Sandy River <br />Unit, (2) implementation of Forum policy for control of salinity through a <br />National pollutant Discharge Elimination System (NPDES) permit, (3) <br />implementation of nonpoint source controls through the water quality <br />management planning process, and (4) participation with the Forum in other <br />measures to control salinity. <br /> <br />other Water Quality problems.--Although eutrophication of Flaming Gorge <br />Reservoir and salinity loading are the major problems in the Green River <br />Basin, there are other isolated impairments of use. Both secondary and <br />primary contact recreation are impaired as a result of high fecal coliform <br />concentrations, and the fishery is impacted by un-ionized ammonia, heavy <br />metals, low temperatures, and turbidity. <br /> <br />B. Utah <br /> <br />Data analyzed from October 1983 through September 1985 generally indicate <br />that total phosphate levels are moderately exceeding the criteria for assigned <br />beneficial uses statewide. Concentrations of total phosphates have increased <br />in most streams as a result of the wetter climate. These increases are due to <br />the increased amounts of overland flow and inundation of vegetated areas. <br />Phosphorus is easily leached from soils and decaying org~nic matter and can be <br />carried in organic and inorganic colloids. Total phosphates come from <br />natural, agricultural, constructional, recreational, mining, and municipal <br />sources. Natural sources of total phosphates are from rock minerals which <br />contain phosphorus. These minerals, namely calcium orthophosphate, are <br />widespread and found in igneous rock and in marine sediments. Phosphate <br />fertilizers contribute total phosphate to stream systems from overland runoff <br />where these fertilizers have been applied. Phosphorus is also a component of <br />domestic wastew~ter and is carried through the trGaG~ent process. <br /> <br />Point sources of pollution can present water quality problems anywhere <br />they are located but are usually more significant in highly populated areas. <br />Wastewater treatment facilities concentrated in certain drainages because of <br />increasing populations can seriously impact receiving streams. <br /> <br />Many of the remaining water quality problems result from nonpoint sources <br />rather than point source discharges. Nonpoint sources of pollutants include <br />natural geologic formations, failing individual wastewater disposal systems, <br />urban sources, hydrologic modifications, agriculture, mining, recreation, <br />construction, and silviculture. Natural sandstone formations in eastern and <br />southern Utah contribute significant amounts of sediments through erosion. <br />Natural deposits of salts, phosphates, fluorides, nutrients, and arsenic also <br />contribute to water quality degradation. <br /> <br />Most of the water allocated in utah is for agricultural use, resulting in <br />one of the primary sources of man induced nonpoint pollution. Diversion of <br /> <br />II 1-2 <br />