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. . long-range salinity problem was identified early in the deliberations, t-:> en but the paucity of data cast doubt upon the ability to deal effectively. IV c~ with it until more data were collected and evaluated. The seven states'have advocated and supported efforts to improve the data base . as quickly as possible. During a series of meetings of the Conferees held in 1966 and 1967, a framework known as "Guidelines for Formulating Water Quality . Standards for the Interstate Waters of the Colorado System" was developed. These guidelines were adopted by the State Conferees and subsequently incorporated individually by each state as part of its WAter quality standards. The "Guidelines" contained numeric criteria for many parameters other than salinity. The "Guidelines" adopted by the states on January 13, 1967, are printed in full in the Appendix B. .. Those guidelines say in part: . "In order to develop practicable and reasonable quality standards for interstate waters in the Colorado River System, full consideration must be given to the numerous factors and variables connected with the control, development, utilization, conservation, and protection of the System's water resources. It is evident that future development and utilization of the System's water resources for expansion of irrigated agriculture, increases in population, and industrial growth will be accompanied by progressive increases in consumptive losses of water and attendant increases in concentration of dissolved solids. . . "The states served by the Colorado River System recognize that answers to important questions regarding total dissolved solids, chlorides, sulfates and sodium are lacking or are based on factors that are not yet well-defined. In respect of this recognition the states agree that pending the development of acceptable answers to enable the setting of criteria for total dissolved solids, chlorides, sulfates and sodium for the Colorado River System, such criteria should be stated in qualita- tive terms. At the same time it is agreed that all identifiable sources of water pollution will be managed and controlled to the maximum degree practicable with available technology in order to provide water quality suitable for present and potential future uses of the System's inter- state waters." . . -4- . .< .:!i,..ij.