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Government Services > Public Works > NPDES
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NPDES Information What is NPDES? The National Pollutant Discharge Elimination System (NPDES) is a federal permit that regulates stormwater and wastewater discharges to waters of the State. While it is a federal permit, the regulatory authority has been passed to Washington State Department of Ecology (DOE). The Permit, which became effective February 16, 2007, authorizes the discharge of stormwater to surface and ground waters from Duvall's storm drainage system. Requirements of the Permit include the development of a Stormwater Management Program (SWMP) which details the actions and activities to be implemented by the City in order to reduce the discharge of pollutants. What is a SWMP? The permit requires that all affected municipalities create and implement a Stormwater Management Program (SWMP) which addresses five required program elements:
The City encourages public comment and participation in the development and implementation of the SWMP throughout the four year process. We plan to utilize the following venues in an effort to keep our residents informed on the progress of the SWMP, so they can provide comments and input as the SWMP develops:
NPDES Phase II 2007 SWMP and Annual Report |
Construction Projects that disturb more than one acre need a Construction Stormwater General Permit (Click Link for more information) While the Permit went into effect in February of 2007, the permit itself phases program implementation requirements out over the next four years.  Helpful Links: Washington State Department of Ecology King County Stormwater Services Building Soil Foundation for Success US EPA FAQs |
Banner Photo courtesy of Serendipity Photography
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