Volunteers pick up trash at Santa Monica Beach during Heal the Bay's Coastal Clean Up Day on Saturday, September 18, 2021. Coastal Cleanup Day is an annual event where volunteers come together to pick up trash and debris from Southland beaches. In 2020, Heal the Bay volunteers collected more than 40,101 pieces of trash from neighborhoods, parks, trails and beaches. Coastal Cleanup Day is part of Coastal Cleanup Month, which takes place the whole month of. September