What does the Municipal Separate Storm Sewer System consist of?
“Municipal Separate Storm Sewer System (MS4)” is any system where the storm water is conveyed separately from the sanitary sewer system. A great variety of natural and manmade structures and land forms are used to construct an MS4. These may include inlets, pipes, earth berms and ditches, box culverts and catch basins, grass or concrete channels and culverts under roadways. All or any of these may be used to carry storm water out of urban areas.
