- King County, Washington

Select year below to view meeting materials.

At-large meeting:

Fourth Wednesdays
10 a.m. – noon

See 2025 Meeting Calendar for dates.

Meetings held online (see meeting agendas for link).
A public meeting space is also provided at King Street Center. As space is limited, please contact Marla.Erickson@kingcounty.gov if you would like to attend from that meeting room.

MWPAAC governance documents

MWPAAC completed to date guiding principles directory, Dec. 14, 2016
MWPAAC principles directory update, June 2, 2016
MWPAAC guiding principles drafted Apr 18, 2014
MWPAAC bylaws adopted Jan 22, 2014
MWPAAC bylaws adopted May 28, 2008
MWPAAC charter adopted May 28, 2008
MWPAAC meeting guidelines Jul 2008
RCW 35.58.210

Meeting materials

Below is a listing of meeting agendas, presentations, meeting summaries, and speakers' information from the MWPAAC meetings.

List of commonly used acronyms in the King County Wastewater Treatment Division

2024 meetings

Meeting	Documents
January 24, 2024	Agenda, Summary, 2025 WTD Rate Strategy Discussions
February 28, 2024	Agenda, Summary, Long-term Capital Needs Methodology Recommendation Letter, Preliminary 2025 Rate-setting Policy Direction and Operational and Capital Investments
March 27, 2024	Agenda, Summary, 2025 Sewer Rate Letter to the King County Executive, Regional Wastewater Services Plan Update
April 24, 2024	Agenda, Summary, 2025 Sewer Rate Letter to the King County Council, Capacity Charge Methodology Study Review
May 22, 2024	Agenda, Summary, Metro/King County Wastewater Treatment: Then and Now, Sewage Disposal Contracts Overview, Combined Sewer Overflow Program Briefing, Regional Wastewater Services Plan Update
June 26, 2024	Agenda, Summary, West Point National Pollutant Discharge Elimination System (NPDES) Permit, Regional Wastewater Services Plan (RWSP) Guiding Principles, RWSP Update
July 2024	No meeting - tour Biosolids in Snoqualmie Forest on July 17.
August 28, 2024	Agenda, Summary, Regional Wastewater Services Plan Update, Guiding Principles – DRAFT RWQC RESOLUTION, Major Policy Questions for Regional Wastewater Services Plan Update, DRAFT Scoping Document for Updating the Regional Wastewater Services Plan, Status Update: WTD Long-Term Financial and Sewer Rate Forecast (Motion 16449)
September 25, 2024	Meeting canceled
October 23, 2024	Agenda, Summary, Stormwater: Understanding the Problem, Regional Wastewater Services Plan Early Code Changes: Introduction and Working Draft
November 2024	No meeting
December 11, 2024	Agenda, Summary, CSI Plan Update – Updated Planning Assumptions for Wastewater Flow Forecasting, Strategic Asset Management Plan (SAMP) Update, Regional Wastewater Services Plan (RWSP) Charter Update and Preview

2023 meetings

Meeting	Documents
January 25, 2023	Agenda, Summary, Review of Adopted 2023-2032 Sewer Rate and Preliminary 2024 Rate-setting Policy Direction
February 22, 2023	Agenda, Summary, 2024 Sewer Rate Process – Sensitivity Analysis
March 22, 2023	Agenda, Summary
April 26, 2023	Agenda, Summary, Discussion of Sewer Rate Letter to Council, NPDES West Point Permit – Overview, Nutrients Update
May 24, 2023	Meeting canceled
June 28, 2023	Agenda, Summary, Discussion of MWPAAC’s Letter on the NPDES West Point Permit, WTD Biogas Systems 101: Gas Sales and Revenues
July 2023	No meeting
August 23, 2023	Agenda, Summary, NPDES Permit Renewal – West Point Treatment Plant, Signature Report, Long Term Financial and Sewer Rate Forecast
September 27, 2023	Agenda, Summary, King County Council Motion – Contaminants of Emerging Concern (CECs), Long-term Rate and Capital Planning Study
October 25, 2023	Meeting canceled
November 29, 2023	No meeting
December 13, 2023	Agenda, Summary, Long-term Rate and Capital Planning Study

2022 meetings

Meeting	Documents
January 26, 2022	Agenda, Summary, Adopted 2022-2031 Sewer Rate Plan and Preliminary 2023 Rate-setting Policy Direction, 2023 Sewer Rate Development Goals and Schedule
February 23, 2022	Agenda, Summary, MWPAAC 101, Preliminary 2023 Rate-setting Policy Direction and Operational and Capital Investments
March 23, 2022	Agenda, Summary, Preliminary 2023 Rate-setting Policy Direction and Operational and Capital Investments, WTD 2023 Sewer Rate Proposal and 10-Year Sewer Rate Plan (2023-2032)
April 27, 2022	Agenda, Summary, Asset Management Project Update, Discussion of Sewer Rate Letter to Council
May 25, 2022	Meeting canceled
June 22, 2022	Agenda, Summary, Revised Sewage Disposal Contracts Overview, Example NE Sammamish Sewage Disposal Agreement
July 2022	No meeting
August 24, 2022	Agenda, Summary, Nutrients Update, Per- and polyfluoroalkyl Substances (PFAS) Update
September 28, 2022	Agenda, Summary, Economic Impacts on WTD Capital Program, King County Equity and Social Justice Initiative and WTD
October 26, 2022	Agenda, Summary, Sammamish Valley Irrigation Research Project and South Plant Sampling, WaterWorks Program Update
November 2022	No meeting
December 7, 2022	Agenda, Summary, Clean Water Plan Update, Asset Management Overview

2021 meetings

Meeting	Documents
January 27, 2021	Agenda, Summary, Clean Water Plan Update, 2021 Draft Work Plan
February 24, 2021	Agenda, Summary, Clean Water Plan Update, Overview of 2022 Sewer Rate Schedule and Process, COVID-19 Impacts on WTD Construction and Education
March 24, 2021	Agenda, Summary, I/I Control Program – MWPAAC I/I Taskforce Recommendation on Regional Best Management Practices, Clean Water Plan Update, 2022 Sewer Rate Recommendation to the Executive (Revised)
April 28, 2021	Agenda, Summary, Clean Water Plan Update, I/I Control Program – MWPAAC I/I Taskforce Recommendation on Regional Best Management Practices and Presentation, Executive’s 2022 Sewer Rate Proposal, and MWPAAC Letter to Council, Developing the WTD Capital Improvement Program (CIP)
May 26, 2021	Agenda, Summary, Clean Water Healthy Habitat, Clean Water Plan
June 23, 2021	Agenda, Summary, Capacity Charge Affordability Program Update, Capital Projects Portfolio Management Update, Clean Water Plan
July 28, 2021	Field trip
August 25, 2021	Agenda, Summary, Clean Water Plan Briefing, Draft Puget Sound Nutrient General Permit Briefing, West Point Power Quality Improvement Project, Council Report on January 2021 Wastewater Bypass
September 22, 2021	Agenda, Summary, Clean Water Plan Briefing, Nutrients Update, Strategic Climate Action Plan Overview
October 27, 2021	Agenda, Summary, Clean Water Plan Briefing, Regional I/I Program Inspector Training and Certification Program – Survey Discussion, Capacity Charge Review Study, Wet weather readiness
December 8, 2021	Agenda, Summary

2020 meetings

Meeting	Documents
January 22, 2020	Agenda, Summary, Clean Water Plan Update
February 26, 2020	Agenda, Summary, Clean Water Plan Update, Overview of Sewer Rate Schedule and Process, Executive Board Proposal on Regional Contract Negotiations – Next Steps
March 25, 2020	Agenda, Summary, 2021 WTD Sewer Rate, Asset Management Needs Overview, 2021 Rate Recommendation to Executive, March 25, 2020; Clean Water Plan Update
April 29, 2020	Agenda, Summary, Clean Water Plan Update, Executive’s Proposed 2021 Sewer Rate, MWPAAC Rates Recommendation Letter to Council
May 27, 2020	Agenda, Summary, Clean Water Plan Update, MWPAAC Clean Water Plan Technical Taskforce Update, Asset Management - Overview and Portfolio Management, Request for Extension of Public Comment Period – Environmental Impact Statement Scoping for the King County Wastewater Treatment Division Clean Water Plan, June 4, 2020
June 24, 2020	Agenda, Summary, Subcommittee reports: Rates & Finance, Engineering & Planning, Clean Water Plan Update, MWPAAC Clean Water Plan Technical Taskforce Update, MWPAAC SEPA Comment Letter, Nutrients Update
July 22, 2020	Agenda, Asset Management Information Session, Asset Management Criteria and Scales
August 26, 2020	Agenda, Summary, Clean Water Plan Update, Industrial Waste Rules Update and Renewal
September 23, 2020	Agenda, Summary, Clean Water Plan Update, Seattle City Light Study, Nutrient Report
October 28, 2020	Agenda, Summary, COVID-19 and WTD Operations, Clean Water Plan Monthly Update, Report on West Point AECOM Recommendations
December 9, 2020	Agenda, Summary, Clean Water Plan Monthly Update, DNRP Work from Home Update

2019 meetings

Meeting	Documents
January 23, 2019	Agenda, Summary, Capacity Charge Affordability and Customer Assistance
February 27, 2019	Agenda, Summary, Overview of the Proposed Operating Board, Clean Water Ambassadors: WTD’s High School Internship Program
March 27, 2019	Agenda, Summary, Discussion of 2020 Sewer Rate and Action on Letter to the Executive, Overview of the Proposed Operating Board, Exhibit 2 - Composition, Voting and Procedures of Operating Board, Mock Operating Board Caucuses Exercise
April 24, 2019	Agenda, Summary, 2020 Sewer Rate and Capacity Charge to Council, Capacity Charge Affordability Implementation Funding (Post 2022), King County Response to MWPAAC Questions (April 24 meeting)
May 22, 2019	Cancelled
June 26, 2019	Agenda, Summary, Clean Water Plan update, Capacity Charge Rate Status Update
August 28, 2019	Agenda, Summary, Capacity Charge Rate Work Group Recommendation, Clean Water Plan Update Briefing, Clean Water Plan Advisory Committee Update: Meeting 1, Meeting 2
September 25, 2019	Agenda, Summary, Update on Implementation of AECOM Recommendations at West Point, Clean Water Plan Update, Capacity Charge Rate Structure Recommendation
October 23, 2019	Agenda, Summary, Lakehaven I/I Reduction Program, Clean Water Plan Update, Clean Water Plan Advisory Committee Update, WaterWorks Grant Program, History of the Regional Sewer System
December 11, 2019	Agenda, Summary, Clean Water Plan Update, Capacity Charge Rate Structure Preferred Option

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