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EPA's stormwater management research, which provides information and tools to prepare communities for natural and man-made contamination events, including from chemical, biological, and radiological incidents.
Stormwater refers to a heavy quantity of water, such as rain or snow, that falls to the surface of the Earth. When it reaches the surface, stormwater becomes polluted as it picks up, carries, and transports various pollutants (oil, grease, chemicals, sediment, nutrients, pathogens) along streets, drains, open channels, and storm sewer systems.
Stormwater management is the effort to reduce runoff of rainwater or melted snow into streets, lawns and other sites and the improvement of water quality, according to the United States Environmental Protection Agency (EPA).
Stormwater management is a crucial practice designed to handle excess runoff from rain and melting snow that flows over streets, parking lots, roofs, and other impermeable surfaces. Without proper management, this runoff can overwhelm storm drains, pollute waters, and cause erosion and flooding.
EPA manages stormwater at its facilities using internal and federal requirements. The Agency’s stormwater management strategies reduce runoff volumes and improve stormwater quality. Learn more about Stormwater Management Practices at EPA.
Stormwater management (SWM) focuses on reducing runoff volumes and improving water quality. Stormwater is all rainwater or melted snow and hail that runs off pavements, streets, lawns, and other land surfaces and did not infiltrate into the soils or other permeable surfaces.
The goals of stormwater management include protecting our environment; reducing flooding to protect people and property; reducing demand on public stormwater drainage systems; supporting healthy streams and rivers; and creating healthier, more sustainable communities. Effective stormwater management provides environmental, social, and economic ...