Storm Water

    Storm Water Management Plan

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    Stormwater Pollution: Effect of Sediment on Stormwater Quality

    Sediment is #1 Pollutant

    Erosion is the process by which water flow and wind remove soil, rock, or other material. When wind and water flows diminish, eroded materials become deposited on the ground. The material deposited is called sediment.

    One of the biggest manmade sediment releases comes from construction activities. Even relatively minor home-building projects can discharge large amounts of sediment if not properly controlled. The EPA has determined that sediment is a major pollutant.

    Sediment can clog storm drains and catch basins and can thereby cause flooding. When runoff carries sediment into local water bodies such as rivers, streams and lakes, it can have a negative effect on water quality, aquatic habitats and human health.

    We can keep our waters clean by establishing plants, placing sod, and spreading mulch to help prevent erosion and sedimentation. It is important for stockpiles to be covered and protected from rain and wind. Sediment discharges can also be prevented by installing barriers around the perimeter of the stockpile.