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<br />Fifth Annual Progress Report <br />Water Quality Standards for Salinity <br />Colorado River System <br /> <br />o <br />t:l) <br />"'" <br />tl~ <br /> <br />December 1982 <br /> <br />Prepared by the <br />Colorado River Basin Salinity Control Forum <br /> <br />.. <br /> <br />Introduction <br /> <br />In 1975, the seven-state Colorado River Basin Salinity <br />Control Forum prepared a report which included numeric <br /> <br />criteria and a plan of implementation and recommended that <br />each state adopt the report as its salinity standards. Each <br />of the Colorado River Basin states adopted the recommended <br />standards which were approved by EPA in November 1976. <br />The Clean Water Act requires that water quality <br /> <br />standards be reviewed at least once each three-year period. <br /> <br />Accordingly, in 1978, and again in 1981 the Forum reviewed <br />the existing state-adopted and ~nvironmental Protection <br />Agency (EPA) approved salinity standards. Based on those <br /> <br />review, the Forum found no reason to recommend changes in the <br /> <br />numeric criteria. <br /> <br />The plan of implementation requires that the Forum's <br />permanent Work Group analyze the progress and results of the <br /> <br />salinity control program as well as other actions in the <br /> <br />Basin which impact on the river's salinity. In addition, the <br /> <br />states, through the Forum, have agreed to submit an annual <br /> <br />report to the Environmental Protection Agency summarizing the <br /> <br />,t,jtJ <br />