为了遵守美国环保局根据修订后的《安全饮用水法》（SDWA）制定的法规，供水设施通常必须安装处理技术，以满足最大污染物水平（MCL）。然而，SDWA对美国环境保护局（USEPA）提出了某些法律要求，规定了降低受监管污染物浓度的最佳可用技术（BAT）。在确定污染物的控制水平（如MCL）和发布偏差时，应考虑BAT。在选择治疗技术时，公用事业应仔细考虑那些被指定为BAT的技术以满足MCLs和那些指定为BAT的用于获得方差的目的。 本文简要概述了现有的最佳技术。包括4个参考文献。

To comply with regulations set by the USEPA under the amended Safe Drinking Water Act (SDWA), water utilities must usually install treatment technology to meet maximum contaminant levels (MCLs). The SDWA, however, imposes certain legal requirements on USEPA to specify the best available technology (BAT) for lowering concentrations of contaminants being regulated. BAT is considered in determining the level of control (e.g. MCL) for a contaminant and in issuing variances. When selecting a treatment technology, utilities should carefully consider those technologies specified as BAT for meeting MCLs and those specified as BAT for purposes of obtaining a variance. This article provides a brief overview of best available technology. Includes 4 references.