最近，美国环境保护局（USEPA）发布了一项法规，明确了跨流域调水何时需要《清洁水法》（CWA）规定的排放许可证。这篇文章讨论的问题是，一个国家 污染物排放消除系统 （NPDES）需要许可证 因为表面的运动 水从一个盆到另一个盆 市政、农业和商业 需求也可能导致劳动力流动 污染物从一个水体流向另一个水体。

Recently, the U.S. Environmental Protection Agency (USEPA) published a regulation that clarifies when a discharge permit is required under the Clean Water Act (CWA) for trans-basin water transfers. This article discusses the question of whether a National Pollutant Discharge Elimination System (NPDES) permit is required because the movement of surface water from one basin to another to serve municipal, agricultural, and commercial needs may also result in the movement of pollutants from one water body to another.