Most participants in a river clean-up (multiple locations)
- Who
- Tru Earth , Milwaukee Riverkeeper
- What
- 2,082 total number
- Where
- United States (Milwaukee)
- When
- 25 April 2026
The most participants in a river clean-up (multiple locations) is 2,082, and was achieved by Milwaukee Riverkeeper (USA) & Tru Earth (Canada) on Milwaukee River, Wisconsin, USA on 25 April 2026.
This record was attempted during the 31st Annual Milwaukee Riverkeeper Spring Cleanup.