本文描述了巴黎市郊公用事业公司的一个大型纳滤（NF）工厂，该工厂于1999年启动，每天生产14万m3的渗透水。该水与另外60000 m3/天的水混合 生物采出水。 数据收集于1998年和1999年，以记录变化前的分布水质。 2000年、2001年和2002年继续开展采样活动，以确定分配的水资源 自NF开始使用以来的质量。结果表明，三卤甲烷的生成量较低，三卤甲烷的数量较少 细菌在改变处理方式3年后，水质现在继续改善。包括8个参考文献和表格。

This paper describes a large-scale nanofiltration (NF) plant at the Suburbs of Paris Utility that was started in 1999, and produces 140,000 m3/day of permeate. This water is blended with another 60,000 m3/day biologically produced water. Data was collected in 1998 and 1999 to document the distributed water quality before the change. Sampling campaigns were continued in 2000, 2001 and 2002 to determine the distributed water quality since NF started being used. Results show a lower formation of THMs, and a lower number of bacteria. Water quality continues to improve now, 3 years after the treatment change. Includes 8 references, tables.