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Municipal Stormwater Permit
Urban areas, including Issaquah, that collect stormwater runoff in municipal storm sewers and discharge it to surface waters are required to have a permit under the federal Clean Water Act.

This permit — called the NPDES (National Pollution Discharge Elimination System) Phase II Municipal Stormwater Permit — requires Issaquah to submit an Annual Report, and create and implement a Stormwater Management Program (SWMP) that includes:
  • Public education and outreach
  • Public involvement and participation
  • Illicit discharge detection and elimination
  • Runoff control from new development, redevelopment and construction sites
  • Pollution prevention
  • Operations and maintenance

The Goal
The City's goal is to protect water quality by reducing the discharge of pollutants from its system to the maximum extent practicable.

Do Your Part
Learn more about what you can do to protect surface and groundwater.