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-50- w ~ Presently, there are 301 NPDES permits in the Colorado CJ River Basin portion of the state, 158 are for domestic or CO municipal facilities and 143 are for industrial facilities. Of this total, ther.e are only 13 major or signifioant minor industrial permits and 21 major or significant minor municipal permits. Actions of particular note since the last review include requirements that six major municipal dischargers "demonstrate the non-practicability of precluding a greater than 400 milligram per liter, incremental increase in salinity in their waste water systems. Analysis of reports to be received from these dischargers will be made and appropriate aotions, which may include permit limitations, will be taken. , Additio~ally, amendments to most industrial permits whi9h lacked' 'salinity monitoring and reporting requirements have been ach i eved. . General permits which are issued for "temporary activities," such as sand and gravel mining, also now contain salinity monitoring and reporting requirements. , Finally, the Colorado Department of Health in cooperation with the Union Carbide Corporation stopped the discharge from the Uravan Uranium Mill in 1985. This was the largest point source discharger in the Colorado River Basin portion of the State. Water Qual i ty Management Plann'ing In the Colorado River Basin of Colorado there are four water quality planning regions (9, 10, 11, and 12). Table 5 indicates the counties within each planning region and the status of the Water Quality Management Plans for each region. The State of Colorado has:direct responsibility for water quality management planning in regions 9 (San Juan) District 10, and II (Colorado West). The Northwest Colo~ado Council of Governments (COG) has responsibility for water quality planning in its area. Opportunities for salinity oontrol were identified in the plans for all areas of the basin within Colorado. Critical salt yielding areas were assessed by the USDA, Colorado Soil Conservation Board, and local soil conservation districts. This effort resulted in the development of the Manoos Valley and Lower Gunnison Stage II units which have been added into the salinity program and gIven appropriate oonsid'eration. In addition, the updated plans contain lists of the NPDES permits within eaoh area and stream classifications. The Northwest Colorado COG is, comprised primarily of the high mountain headwaters of the Colorado River and produces little salt loading to the river system. This Water Quality Management Plan directs salinity control efforts towards control of point sources and local control of non-point sources in the form of urban runoff. The Water, Quality Management Plan for this region, withdrawn from certification due to litigation, has been revised and updated and is presently being reviewed by the state.