美国环境保护局（USEPA）第2阶段消毒剂和消毒副产品规则（第2阶段DBP规则）要求公用事业单位保持最大 总三卤甲烷（TTHMs）的污染物水平（MCL）为80 ppm，而总三卤甲烷（TTHMs）的污染物水平为60 ppm 指定采样点的卤乙酸（HAA）。伯明翰水务局 （BWWB）设定了80%的MCL目标（TTHM为64 ppb，TTHM为48 ppb） HAA）对于每个第2阶段现场位置的运行年平均值（LRAA）。对于 本研究的目的是将80%的MCL目标应用于这些患者 样本位置。 为了遵守第2阶段DBP规则，供水商确定了位置 配电系统中DBP浓度较高（EPA 2003）。这些 这些地点将成为合规监测点（EPA 2003）。DBP将是 使用一种方法计算配电系统中每个监控位置的 被称为位置运行年平均值（LRAA）（EPA 2003）。 BWWB正在采取积极主动的方式，预测即将到来的更严格的挑战 第2阶段DBP规则要求。BWWB已经实施了20多个项目 涉及DBP依从性的研究。本研究考察了DBP的潜在形成 在成品水储罐中。人们普遍认为，水箱混合可以提高水质，减缓DBP的生成。BWWB正在进行一项研究，研究 混合和水龄与DBP形成的相关性。包括4个参考文献、表格和图表。

The U.S. Environmental Protection Agency (USEPA) Stage 2 Disinfectants and Disinfection Byproducts Rule (Stage 2 DBP Rule) mandates that a utility maintain a maximum contaminant level (MCL) for total trihalomethanes (TTHMs) at 80 parts per billion (ppb) and 60 ppb for haloacetic acid (HAA) at designated sampling sites. The Birmingham Water Works Board (BWWB) has set a goal of 80 percent of the MCL's (64 ppb for TTHM, 48 ppb for HAA) for each Stage 2 site locational running annual average (LRAA). For the purpose of this study, the goal of 80 percent of the MCL was applied to these sample locations. To comply with the Stage 2 DBP Rule, water providers identified the locations with high DBP concentrations in their distribution systems (EPA 2003). These locations will become compliance monitoring sites (EPA 2003). DBPs will be calculated for each monitoring location in the distribution system using a method known as locational running annual average (LRAA) (EPA 2003). The BWWB is taking a proactive approach in anticipating the impending, stricter Stage 2 DBP Rule requirements. The BWWB has implemented over twenty studies involving DBP compliance. This study examines potential DBP formation in finished water storage tanks. It is widely assumed that tank mixing enhances water quality, and slows the creation of DBPs. The BWWB is conducting a study, which examines the correlation between mixing and water age to DBP formation. Includes 4 references, tables, figures.