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Environmental Services - How to Report a Sighting



Environmental Services

3500 Industrial Blvd.
West Sacramento, CA 95691
(916) 376-9701

Mailing Address:
P.O. Box 942836
Sacramento, CA 94236-0001



How to report a sighting?

How to Report a Quagga or Zebra Mussel Sighting

If You Find Suspect Quagga or Zebra Mussels:

  • Collect several specimens

  • Record the precise location (for example, waterbody, nearest landmark, GPS coordinates, etc.)

  • Record the date

  • Preserve the specimens in ethanol, rubbing alcohol, a freezer, or allow to air dry

  • Provide us with your contact information (name, phone number, etc.)

Immediately Notify our Aquatic Nuisance Species Staff :

Phone: 1-888-840-8917 (toll free)


covered crayfish


Whatever you do,
please DO NOT throw Zebra Mussels
back in the water!


crayfish covered with zebra mussels