Coastal Cleanup Day is an annual waterway and land cleanup held in  September. It’s California’s largest volunteer event and brings community awareness to protecting our marine environment from litter. 

San Mateo County Environmental Health Services coordinates the event in partnership with the California Coastal Commission, the Ocean Conservancy, and many local partners.

Sign up for reminder emails about Coastal Cleanup Day! Join other litter cleanup events held throughout the year. 

Review results and images from Coastal Cleanup 2025.

Coastal Cleanup 2026

• Volunteers – check back late July for cleanup site and registration information. Questions? Call (650) 388-2096 or email pollutionprevention@smcgov.org.
• Interested in becoming a Site Captain? If you are interested in hosting your own cleanup location, please contact Connie Tran at (650) 388-2096 or ctran1@smcgov.org. 

Thank You Statewide and Local Partners!

• Bair Island Aquatic Center
• BayLands FrontRunners
• Burlingame Intermediate School 
• California Coastal Commission
• California Department of Boating & Waterways
• California State Parks
• California State Parks Foundation
• City of Belmont
• City of Brisbane
• City of Burlingame
• City of Millbrae
• City of Redwood City
• City of San Bruno
• City of San Mateo
• City of South San Francisco
• Coastside Land Trust
• Girl Scouts
• Grassroots Ecology
• Half Moon Bay Rotary Club 
• Marina Lagoon Action Committee
• Ocean Conservancy
• Oyster Point Dragons
• Pacific Beach Coalition
• Pacific Rim International School 
• San Gregorio Environmental Resource Center
• San Mateo County Harbor District
• San Mateo County Office of Sustainability 
• San Mateo County Parks
• Sea Hugger
• Sequoia Yacht Club
• Surfrider
• The Club at Westpoint