Impervious surfaces are areas that impede the infiltration of water into the soil (rooftops, driveways, parking lots, roads, severely compacted soil, etc). When it rains, water flows over impervious surfaces and is directed to a waterway or into a stormwater drain/inlet. As the water travels, it picks up debris, dirt, pesticides, excess nutrients from fertilizers, litter, pet waste, fluids from leaking cars and other pollutants. Stormwater drains are connected to a series of underground pipes that lead to streams or rivers. These systems are not designed to capture debris or treat the water as in a sanitary system that leads to a wastewater treatment plant. Thus once the runoff enters the stormwater system, it travels unfiltered and untreated directly to local waterways. This pollutant load is harmful to the aquatic environment and degrades the stream’s water quality. In addition, the sudden surge and velocity of runoff during a storm event causes stream erosion, floodplain degradation and possible flooding.