自1987年以来，纽约市加强了其综合流域监测计划（包括病原体监测），制定了疾病监测和疫情检测计划，并实施了改善水质的流域保护计划。在联邦地表水处理规则（SWTR）下，城市认识到优质水源和有效的流域保护是避免过滤的基础。因此，该市申请并收到了其系统的卡茨基尔和特拉华部分的过滤避免决定。本文总结了该市在SWTR背景下的水质数据和流域监测与保护计划。 《1997年1月签署的土地收购、流域合作协议备忘录》和《1997年1月21日签署的流域合作协议备忘录》。作为流域协议的一部分，美国环保局发布了一份为期四个月的临时避免过滤措施，并将在1997年发布一份修订后的避免过滤措施函。如果该市符合某些规定，这将使其至少在2002年4月15日之前避免过滤卡茨基尔和特拉华州的物资。包括6个参考文献、表格、图表。

Since 1987, New York City has enhanced its comprehensive watershed monitoring program (including pathogen monitoring), developed a disease surveillance and outbreak detection program, and implemented a watershed protection program that has improved water quality. The city recognized that high quality source water and effective watershed protection are the foundation of filtration avoidance under the federal Surface Water Treatment Rule (SWTR). Accordingly, the city applied for and received filtration avoidance determinations for the Catskill and Delaware portions of its system. This article summarizes the city's water quality data and watershed monitoring and protection programs in the context of the SWTR. A Watershed Memorandum of Agreement, signed January 21, 1997, provides for land acquisition, updated watershed regulations, and partnership programs. As part of the watershed agreement, USEPA issued a four month interim filtration avoidance and will issue a revised filtration avoidance letter in 1997. Provided the city meets certain provisions, this will allow it to avoid filtering the Catskill and Delaware supplies until at least April 15, 2002. Includes 6 references, tables, figures.