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Storm water runoff is water that comes from precipitation, rain or snow belt, that flows over ground surfaces instead of soaking into the ground. As it flows, storm water runoff picks up sediment, oils, chemicals, debris, and other pollutants and carries them away. The contaminated storm water runoff can then be deposited in nearby wetlands, creeks, rivers, and other waterways either directly or via a municipal storm water system. Storm water runoff occurs everywhere. In forests, on farmland, in parking lots, etc. But the amount and type of debris and pollutants it picks up differ from place to place. The volume, velocity, and temperature of the storm water runoff and the ability of the ground to absorb it also vary from place to place.