public works

Surface Water Management

Press Enter to show all options, press Tab go to next option

“Residents of this region enjoy a way of life centered around the waters of Puget Sound featuring…...irreplaceable aesthetics, and other activities, all of which to some degree depend upon a clean and healthy marine resource.”

-Puget Sound Water Quality Protection Act, 1996


In 1996 the Washington State Legislature established the Puget Sound Water Quality Management Program that clearly delineates federal, state and local action necessary to protect and restore the biological health and diversity of Puget Sound. The plan includes the framework describing various governmental roles for enhancing recreational opportunities, and restoring a balanced population of indigenous shellfish, fish and wildlife. Using this road map, the City of Maple Valley developed a long term strategy that implements the goals outlined in the Puget Sound Water Quality Management Program.

Surface Water Management in Maple Valley

The City’s Surface Water Management Program (SWMP) is continuing to improve the quality of life for Maple Valley residents, businesses, visitors and neighboring communities. The following outlines individual components of the Surface Water Quality Program, which were developed in preparation for the Washington State Department of Ecology issued National Pollutant Discharge Elimination System (NPDES) Phase II Storm Water Permit under the Federal Clean Water Act.

  • Public Education/Public Involvement
  • Illicit Discharge Detection and Elimination
  • Construction Site Stormwater Runoff Control
  • Post Construction Stormwater Control
  • Municipal Operations Pollution Prevention

Additional Information


Report Spills and Other Water Quality Issues


Spills and other water quality issues can be reported to the Public Works Department by calling 425-413-8800 during business hours, Monday - Friday, 8:00 a.m. to 5:00 p.m., or 206-391-4212 after hours, weekends, or holidays and/or the Washington Department of Ecology at 1-800-645-7911.

In order to protect water quality, the public is encouraged to report spills and improper disposal, including suspected illicit connections or discharges into the City’s municipal stormwater system or any body of water in Maple Valley.

Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Download Acrobat Reader Flash Player Download Flash Player Windows Media Player Download Windows Media Player Microsoft Silverlight Download Microsoft Silverlight Word Viewer Download Word Viewer Excel Viewer Download Excel Viewer PowerPoint Viewer Download PowerPoint Viewer