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Show PART II PRESENT STATUS The largest municipalities in the subregion and 1960 populations are Price, Utah (6,802); Vernal, Utah (3,655); Craig, Colorado (3,984); Rock Springs, Wyoming (10,371); and Green River, Wyoming (3,497). The Rock Springs and Green River municipal systems are supplied by a single treat- ment plant. The 1963 PHS inventory listed 46 municipal systems in the subregion. The inventory showed that 28 municipal systems needed improvement to provide adequate water service. It was indicated that 10 municipal systems needed source improvement and 29 needed water treatment improve- ments. Craig, Colorado was listed as needing both surface water source and treatment improvements. The extent of water treatment provided by subregional municipal systems is shown in Table 14. Table 14 - Municipal Water Treatment Green River Subregion Type of Water Treatment Number of Municipal Systems More than disinfection Disinfection only None 14 19 11 46 An estimated population of 18,000, or 18 percent of the subregion population was served by rural-domestic systems. There are numerous rural communities in the subregion with population greater than 50 which do not have central municipal systems. Upper Main Stem Subregion The 1965 Upper Main Stem Subregion M&I withdrawal requirements supplied by various distribution systems are summarized in Table 15. Seventy-five percent of these requirements were supplied by surface water sources and the remainder by groundwater sources. 28 |