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Stormwater, also written storm water, is water that originates from precipitation , including heavy rain and meltwater from hail and snow. Stormwater can soak into the soil ( infiltrate ) and become groundwater , be stored on depressed land surface in ponds and puddles , evaporate back into the atmosphere, or contribute to surface runoff .
Polluted stormwater is one of the biggest threats to clean water in the U.S., but it's not treated like wastewater. Here's why.
Research on stormwater pollution continues in the 21st century, with findings that urban runoff is a ongoing source of water quality problems nationwide. [ 26 ] : vii Increased land development throughout the country—in both cities and suburbs—has led to an increase in impervious surfaces ( parking lots , roads , buildings , compacted soil ...
The Stormwater Pollution Prevention Plan, often abbreviated as SWPPP or SW3P, is a plan created by constructors to show their plans for sediment and erosion control. [1] Typically these plans are part of an overall design that details procedures to be followed during various phases of construction.
Water pollution (or aquatic pollution) is the contamination of water bodies, with a negative impact on their uses. [1]: 6 It is usually a result of human activities.. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwa
Runoff and storm water drain into the retention pond allowing for the contaminants to settle out and become trapped in the pond. The use of porous pavement allows for rain and storm water to drain into the ground beneath the pavement, reducing the amount of runoff that drains directly into the water body.
To address the nationwide problem of stormwater pollution, Congress broadened the CWA definition of "point source" in 1987 to include industrial stormwater discharges and municipal separate storm sewer systems ("MS4"). [30] These facilities are required to obtain NPDES permits. This 1987 expansion was promulgated in two phases.
Urban runoff is surface runoff of rainwater, landscape irrigation, and car washing [1] created by urbanization. Impervious surfaces (roads, parking lots and sidewalks) are constructed during land development.