2001年9月11日的恐怖袭击， 在某种意义上造成了巨大的变化 安全和保护，大多数美国人 感受到来自外部的威胁 造成伤害。这篇文章 AWWA杂志对美国的年度评论 美国环境保护局（USEPA） 《环境法》下的饮用水监管议程 《安全饮用水法》已经扩大 包括应急计划，包括 应对自然灾害和气候变化 故意引入污染物 进入供水系统。 虽然信息通常是有限的 关于化学药品饮用水的安全水平 以及大规模杀伤性生物武器 （大规模杀伤性武器）外来污染物的引入 变成饮用水供应系统 大规模杀伤性武器非常困难。因此，一般来说 不被认为是可能的威胁。更多 可能的威胁可能来自 目前受监管的污染 化学物质、微生物或普通的 不受管制的化学品或微生物， 水处理系统中的污染物 不会被设计为移除或灭活 因为特工通常不会 预计会发生。 随着规则制定过程的推进 2001年期间，最终过滤器反洗 回收规定于6月发布，并进行了审查 之前于年发布的最终砷规则 2001年1月，美国环保局通过了 2001年10月31日宣布 该机构只是打算 2001年规则生效。在 微生物/消毒副产物（M/DBP） 规则，第二阶段的正式提议规则 DBPR和长期阶段2增强 地表水处理规则是预期的 2002年11月，最终规则是 预计在2003年11月。虽然有几个 在这方面没有达到法定期限 2001年，预计将对几个问题采取最后行动 2002年的主要规则，包括氡 规则和地下水规则。文章 随附的表格也更新了 众多项目的范围、状态和时间表 正在制定的其他关键法规 美国环保局。包括64个参考文献和表格。

The terrorist attacks on Sept. 11, 2001, caused a sea change in the sense of safety and protection that most Americans felt regarding the threat of externally imposed harm. This article, which is JOURNAL AWWA's annual review of the US Environmental Protection Agency's (USEPA's) drinking water regulatory agenda under the Safe Drinking Water Act, has been expanded to include emergency planning that incorporates responses to both natural disasters and the deliberate introduction of contaminants into a water supply. Although information is generally limited on safe levels in drinking water for chemical and biological weapons of mass destruction (WMDs), the introduction of an exotic contaminant into a drinking water supply as a WMD is very difficult. Thus, it is generally not considered to be a likely threat. A more likely threat would probably come from contamination by a currently regulated chemical or microorganism or a common unregulated chemical or microorganism, contaminants that a water treatment system would not be designed to remove or inactivate because the agent would normally not be expected to occur. As the rulemaking process moved forward during 2001, the final filter backwash recycle rule was issued in June, and a review of the final arsenic rule previously issued in January 2001 resulted in a USEPA announcement Oct. 31, 2001, that the agency simply intended to let the January 2001 rule go into effect. In the area of microbial/disinfection byproduct (M/DBP) rules, formal proposed rules for the Stage 2 DBPR and Long-term Stage 2 Enhanced Surface Water Treatment Rule are expected in November 2002, and a final rule is expected in November 2003. Although several statutory deadlines were missed in 2001, final action is expected on several major rules in 2002, including the radon rule and the Ground Water Rule. The article and the accompanying tables also update the scope, status, and schedules of numerous other key regulations under development by USEPA. Includes 64 references, tables.