NPDES Phase II Municipal Stormwater Permit

Contact Information

The Western Washington Phase II Municipal Stormwater Permit, also known as the National Pollutant Discharge Elimination System (NPDES) Permit, was first issued on January 17, 2007, by the Washington State Department of Ecology under the provisions of the U.S. Environmental Protection Agency's Clean Water Act. The current five-year permit went into effect on August 1, 2019.  There are a total of 83 cities and five counties in Western Washington that must comply with the permit.

The permit has specific requirements and deadlines for implementation of programs to minimize the discharge of pollution from municipal stormwater systems into our streams, lakes, rivers and wetlands to protect their beneficial uses (swimming, boating, fishing, aesthetics) and other environmental resources.

The City of Renton is classified as a "small" municipal separate stormwater sewer system (MS4).

Stormwater Management Program Plan

The Stormwater Management Program Plan (Plan) describes the city’s planned actions and activities for the year to meet the requirements of the Western Washington Phase II Municipal Stormwater Permit issued by the Washington State Department of Ecology.

Review and Comment

The city encourages public comment and participation in the development and implementation of the Plan. Feedback on the 2021 Draft Stormwater Management Program Plan will be used to shape the next iteration of the plan.

Please provide your comments to Kristina Lowthian by March 15, 2021.

Comments received after this date will be accepted for the following year's Stormwater Management Program Plan.

2019 NPDES Report

Submitted to the Department of Ecology on March 31, 2020.

2019 NPDES Annual Report Attachments

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