Watershed an area of land that drains into a body of water such as a lake or river.
Stormwater or Stormwater Runoff rain and/or snowmelt that runs over the ground where it can pick up pollutants such as sand, salt, oil, gasoline, nutrients and bacteria.
Non-Point Source Pollution refers to pollution that originates from many different sources (opposite of Point Source Pollution) and is caused by rainfall or snowmelt moving over and through the ground, which picks up and carries these pollutants to waters.
Point Source Pollution refers to pollution from a single identifiable source, such as a sewage treatment plant discharge.
Infiltration when water soaks up or is absorbed into the ground.
Impervious Surface a surface that cannot absorb or soak up liquid such as pavement on roads, sidewalks, parking lots and roofs.
Pervious Surface a surface that soaks up or absorbs liquid such as areas with soil like the forest or a garden.
Structural Stormwater Best Management Practice (BMP) refers to structural or engineered controls that can help reduce or treat stormwater pollution.
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