水过滤工艺技术的进步和新型聚合物混凝剂的可用性，使得直接过滤及其伴随的成本节约在许多情况下成为一种可行的处理设计。本报告由AWWA过滤委员会的直接过滤小组委员会编制，并经技术和专业委员会批准，讨论了对使用直接过滤工艺的运行和试验工厂进行的全球调查的结果。还包括:原水质量、藻类、温度、pH值、化学品、混合能源、煤介质、反洗、浊度、残余铝、颜色、铁和锰、有机物、病毒和细菌去除，以及水的监测和分析。

Advances in water filtration process technology and the availability of new polymer coagulants have made the use of direct filtration with its attendant cost savings a viable treatment design in many cases. Prepared by the Direct Filtration Subcommittee of the AWWA Filtration Committee and approved by the Technical and Professional Council, this report discusses the results of a worldwide survey of operating and pilot plants that are using the direct filtration process. Also covered are: raw water quality, algae, temperature, pH, chemicals, mixing energy, coal media, backwash, turbidity, residual aluminum, color, iron and manganese, organics, virus and bacteria removal, and monitoring and analysis of water.