The non-native, highly invasive golden mussel was discovered in Sacramento-San Joaquin Delta in October 2024. Once established, they can affect flood control by reducing water flow and contribute to harmful algal blooms. Please contact the waterbody you plan to visit for latest information about launching requirements. Since golden mussels and their larval offspring are very small, they may easily go unseen on your watercraft. To keep our favorite lakes and rivers free from this risk, please Clean, Drain, Dry equipment and watercraft before and after entering a waterbody: California State Parks: Boating and Waterways
To learn more about how the presence of the golden mussel could increase harmful algae and impede flood control.
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