Measuring Street Sweeping 6PPDQ Whole Environment Load Reductions
Seattle Public Utilities is monitoring the potential for street sweeping to reduce the amount of tire wear pollutants, including 6PPD-quinone (6PPDQ), on the roadway. This new information will help permittees and Ecology adaptively manage street sweeping programs to better address stormwater impacts and specifically target 6PPDQ reductions.
Study Questions
- Does street sweeping reduce 6PPDQ pollutant loads from Seattle’s arterial streets?
- Are the concentrations and pickup rates of 6PPDQ and other parameters influenced by particle size, season, or land use?
- Can we detect a correlation between the concentrations of 6PPDQ and zinc, another tire contaminant? If so, could zinc be used as a 6PPDQ indicator to reduce analytical costs?
- To what extent does street sweeping reduce the pollutant loads of other contaminants on the street?
Study Findings
This project will continue through December 2028.
Project Tasks & Key Deliverables
- Project Management
- List of TAC members
- 2024 annual status report
- 2025 annual status report
- 2026 annual status report
- 2027 annual status report
- Study Design
- Revised Quality Assurance Project Plan
- Field Sampling, Data Collection, Analysis, and Validation
- 2024 data package
- 2025 data package
- 2026 data package
- 2027 data package
- Communication of Findings
- Final Report
- SAM Fact Sheet
- Stormwater Work Group Presentation
- Local or regional Presenation
Related links
Contact information
Raghu Namburi (he/him)
Stormwater Action Monitoring Coordinator & Engineer
raghu.namburi@ecy.wa.gov
360-628-4989