Like many other urbanizing river basins, the Utah Lake drainage area is faced with serious water quality degradation associated with expanding water use. While the region is not water-short, the downstream water users are encountering water deficiencies. A model has been developed which optimized the allocation of water pollution abatement policies among agricultural and urban water uses. In addition, an analysis is made in which water quality management in areas surrounding Utah Lake is coordinated with the alternatives of lake diking and regional desalination. The results indicate that urbanization emphasizes control of urban pollution because of the inherent economies of scale in wastewater treatment facilities. (Modified author abstract)