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Coastal Cleanup Day

General information

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 2025.

Coastal Cleanup 2025 – Information & Registration Coming Soon!

  • Volunteers – check back late July for cleanup site and registration information
  • 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!