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Combined Sewer Outfall Sewer Shed
District of Columbia —
DC Water operates a wastewater collection system comprised of "separate" and "combined" sewers. Approximately two-thirds of the District is served by a separate sewer... -
Storm Sewer System
District of Columbia —
The dataset contains locations and attributes of storm sewer systems including the combined sewersheds within the DC Water jurisdiction. There are small areas within... -
State
Small MS4 (Municipal Separate Storm Sewer Systems) Area
Vermont Center for Geographic Information —
The dataset contains the boundaries of the MS4 general permit, which are defined as the intersection of US Census urbanized areas and the watershed boundaries of the...