选择慢速砂滤是为了满足加利福尼亚州坎普顿维尔社区的地表水处理规则要求。慢砂过滤设施使用预制混凝土拱顶，由卡车运输至现场，并以线性布置，以适应陡峭山坡现场的轮廓。加利福尼亚州卫生服务部认为这种替代过滤过程可以减少2-log贾第鞭毛虫和1-log病毒。通过消毒可以去除3-log贾第鞭毛虫和4-log病毒。该设施于1991年12月开始运行，尽管河流浊度>30 ntu，但处理后的水浊度仍保持在<1.0 ntu。该过程有效地去除了社区备用地下水供应中的高水平铁和锰。此外，较低的建设、运营和维护成本降低了客户的成本。 包括6个参考文献、表格、图表。

Slow sand filtration was selected to meet the Surface Water Treatment Rule requirements for the community of Camptonville, California. The slow sand filtration facility uses precast concrete vaults, hauled by truck to the site and laid out in a linear arrangement to adjust to the contour of the steep hillside site. This alternative filtration process is credited by the California Department of Health Services with 2-log Giardia and 1-log virus reduction. A 3-log Giardia and 4-log virus removal can be achieved with disinfection. The facility began operation in December 1991 and has maintained a treated water turbidity <1.0 ntu, despite stream turbidities of >30 ntu. The process effectively removes high levels of iron and manganese from the community's backup groundwater supply. In addition, low construction and operating and maintenance costs have kept customers' costs down. Includes 6 references, tables, figures.