Seattle Public Utilities

Research Papers

Reducing Plastic Pollution through Progressive Policies - 2018
This report prepared for Seattle Public Utilities (SPU) by a team of four graduate MPA consultants from the Evans School of Public Policy and Governance at the University of Washington. Contains findings, analyses, and recommendations based on surveys administered to 105 Seattle businesses, focusing on compliance rates and perceptions of Seattle’s single-use plastic waste reduction policies. This information is supplemented with a comprehensive review of relevant literature.

On-Site Foodwaste Processing Demonstration Projects – 2017
This report summarizes three on-site foodwaste processing demonstration projects conducted with local businesses. The two different processing technologies used were found to be feasible at grocery stores and breweries.

Goals, Metrics, and More: Defining Success in Materials Management (pdf)
Overview of Seattle Public Utilities’ New Metrics Symposium - Goals, Metrics, and More: Defining Success in Materials Management Symposium, held November 2, 2017 at the University of Washington, Center for Urban Horticulture. This Summary Report highlights the Symposium’s key discussion themes, among local and regional stakeholders from across the materials management lifecycle. It explored new options for defining success in materials management, that go beyond a weight based recycling rate. The report includes key takeaways, and new information on how we can better define recycling success, by expanding on the weight based recycling rate, to include new metrics that better identify the full environmental benefits recycling has to offer.

Food Waste Prevention & Recovery Assessment – 2016 (pdf)
This report provides a current summary of challenges and opportunities in commercial food waste prevention and recovery in Seattle. Findings are based on 26 in-depth interviews conducted with anti-hunger agencies, food-generating businesses and public agencies.

Proposed Green Fee - 2008
This paper contains the background data on the 2008 Seattle City Council proposal to put a 20-cent per bag "Green Fee" on all paper and plastic disposable shopping bags provided by grocery, drug and convenience stores. The proposal was defeated by voters.

Food Waste Collection Pilot - 2000 (pdf)
The 2000 pilot project was designed to test if food waste could be added to Seattle’s existing biweekly yard waste collection program. Food waste was added to Seattle’s yard waste collection program in 2009.

The Role of Full Cost Accounting in Solid Waste Management - 1999 (pdf)
This 1999 paper details Seattle’s journey from crisis to an international reputation as a leader in municipal recycling.

Using Spreadsheet Models for Estimating Collection Costs - 1999 (pdf)
This paper describes two spreadsheet models developed by Seattle Public Utilities (SPU) to estimate collection costs. The models consider variations in collection frequency, truck types, material separation requirements, transfer points, and more for single-family, multi-family and commercial customers.

Measuring Backyard Composting - 1998 (pdf)
This presentation was delivered at the WSRA conference in 1998 and focuses on how we measure tonnage diverted by backyard composting.