MS4 Storm Sewer Outfalls

For better understanding this layer was renamed from MS4 Storm Sewer Outfalls to Municipal Separate Storm Sewer (MS4) Outfalls. This data is a requirement of the District's MS4 Permit. It is used for Stormwater Management in the District of Columbia.为便于理解，该图层已由原名称MS4雨水管道排放口（MS4 Storm Sewer Outfalls）更名为市政分离式雨水管道（Municipal Separate Storm Sewer，缩写MS4）排放口。本数据集是本辖区MS4许可（MS4 Permit）的法定必备内容，用于华盛顿哥伦比亚特区的雨水管理工作。