By 2008, the water quality of Miyun and Huairou reservoir should keep meeting national standards, Guanting reservoir should basiclly resume the function of drinking water source; tap water quality should continue to meet WHO guidelines.

• 到2008年，结合流域水资源合理利用和水污染防治工作，密云、怀柔水库水质继续符合相应国家标准，官厅水库基本恢复饮用水源功能，城市饮用水水质继续符合世界卫生组织指导值的要求。