美国环境保护局（EPA）计划审查全国污染物排放情况 排放消除系统（NPDES）允许以流域为基础，并 将总最大日负荷（TMDL）废物负荷分配纳入未来 NPDES许可证。这将使EPA能够全面评估NPDES许可证 框架定义流域内的所有NPDES许可证将在 五年流域周期。凤凰城及其周边地区 集团（SROG）合作伙伴格伦代尔、梅萨、斯科茨代尔和坦佩经营着第91家 大道污水处理厂（WWTP）排放经过高度处理的废水 去盐河。斯罗格和第九十一大道污水处理厂在吉拉河中间。 分水岭（MGRW）。SROG于年启动了第91大道污水处理厂再生水研究 对地表水质量标准和NPDES许可证增加的回应 监测要求。再生水研究确定了成本效益， 环境无害的水再利用替代方案，而不是建造 91大道污水处理厂的改进。作为再生水研究的一部分，63 对水再利用替代方案进行了评估。这些替代方案及其对环境的影响 未来的NPDES许可证已提交给EPA。本文讨论了结果 在MGRW研究中，第91大道污水处理厂再生水研究是其中一项 部分包括2个参考文献。

The U.S. Environmental Protection Agency (EPA) plans to review National Pollutant Discharge Elimination System (NPDES) permits on a watershed basis and to incorporate Total Maximum Daily Load (TMDL) waste load allocations into future NPDES permits. This will allow the EPA to assess NPDES permits in a comprehensive framework. All NPDES permits within a defined watershed will be evaluated in five-year watershed cycles. The City of Phoenix and its Subregional Operating Group (SROG) partners, Glendale, Mesa, Scottsdale and Tempe, operate the 91st Avenue Wastewater Treatment Plant (WWTP) which discharges highly treated effluent to the Salt River. SROG and the 91st Avenue WWTP are in the Middle Gila River Watershed (MGRW). SROG initiated the 91st Avenue WWTP Reclaimed Water Study in response to an increase in Surface Water Quality Standards and NPDES permit monitoring requirements. The Reclaimed Water Study identified cost effective, environmentally sound water reuse alternatives as opposed to constructed improvements at the 91st Avenue WWTP. As a part of the Reclaimed Water Study, 63 water reuse alternatives were evaluated. These alternatives and the effect on a future NPDES permit were presented to the EPA. This paper discusses the results of the MGRW study, of which the 91st Avenue WWTP Reclaimed Water Study was a part. Includes 2 references.