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The Metropolitan Water Pollution Abatement Advisory Committee, or MWPAAC, advises the Metropolitan King County Council and the King County Executive on matters related to water pollution abatement.

It was created by state law (RCW 35.58.210 ) and consists of representatives from cities and local sewer utilities that operate sewer systems within King County's service area.


Coming soon: required business wastewater survey

This fall or winter, look for a letter from King County with an online survey about your organization’s wastewater. All companies are required to complete the survey.

King County helps companies protect the environment while doing their business. King County is surveying thousands of companies and organizations that may send industrial wastewater to the sewer. “Industrial wastewater” comes from almost any business processes except toilets and sinks in bathrooms or break rooms.

All companies must dispose of their waste properly. But, only some need permits or formal authorization to send industrial wastewater to the sewer. Your answers to the survey will help determine what your organization needs. Even if you only have rest rooms or break rooms on site, your response to the survey is important.

Learn more at

  • At-large meeting:

    Fourth Wednesdays
    10 a.m.–noon

    Tukwila Community Center
    12424 42nd Avenue S
    Tukwila, WA 98168
    Room: Banquet A&B
    Service Desk: 206-768-2822

  • Subcommittee meetings:

    First Thursdays
    8:30 a.m.–noon

    Bellevue City Hall
    450 110th Avenue NE
    Bellevue, WA 98009
    Room 1E-112
    Service Desk: 425-452-6800