National Pollutant Discharge
Elimination System (NPDES)

Welcome to Snohomish County's
NPDES Web Site.

This site contains information about the County's National Pollutant Discharge Elimination System (NPDES) municipal stormwater permit and the actions the County must perform under this permit to minimize or prevent stormwater pollution. This permit is part of the federal Clean Water Act. Snohomish County has operated under such a permit since 1995.

In addition to the NPDES municipal stormwater permit, the County also operates under NPDES industrial stormwater permits (applicable to some County Solid Waste facilities and Paine Field) and NPDES construction stormwater permits (applicable to some County construction projects). This Web site focuses on the municipal stormwater permit.

The links below provide information about the municipal stormwater permit, what the County has done and will do to meet the permit requirements, how you can get involved, and other information.

  NPDES stormwater permit background 

  Required actions under the NPDES municipal stormwater permit

  How you can get involved 

  Stormwater Management Program documents and annual reports

  * NPDES-related County codes, County Engineering Design & Development Standards (EDDS), and the County Drainage Manual 

  General information about stormwater. The following documents contain information about stormwater and stormwater-related problems:

• Protecting Washington's waters from stormwater pollution (Department of Ecology)
  
• Control of Toxic Chemicals in Puget Sound - Phase 1: Initial Estimate of Toxic Chemical Loadings to Puget Sound (Department of Ecology / USEPA / Puget Sound Partnership)
  

  How to report a water pollution problem