新泽西州哈肯萨克水务公司（Hackensack Water Company）的一项为期五年的中试工厂研究表明，混凝、臭氧氧化和直接过滤可以成功地用于处理Oradell水库的水，生产出溶解固体更少、味道和气味更好的成品水。霍沃斯过滤厂的拟议扩建，使用预区处理和直接过滤，将大大减少明矾、氯和烧碱的使用。此外，处理过程中产生的污泥更少，污泥处置成本更低。 包括参考，表格。

A five-year pilot-plant study at the Hackensack Water Company in New Jersey showed that coagulation, ozonation, and direct filtration could be used successfully to treat water from the Oradell Reservoir, producing a finished water with fewer dissolved solids and improved taste and odor. The proposed expansion of the Haworth Filtration Plant, using preozone treatment and direct filtration, will substantially reduce the use of alum, chlorine, and caustic soda. In addition, less sludge will be produced in the treatment process and sludge disposal will be less costly. Includes reference, tables.