Skip to main content

Environmental Health Services is open Monday-Friday from 8am to 5pm.  Members of the public that are not vaccinated should wear a mask for the safety of County staff and other members of the public. The County will not verify vaccination status among members of the public visiting our facilities who are not wearing masks. Please visit for current COVID-19 information.

The Health Agency is actively responding to COVID-19 and continuing to provide other essential services. Please see updates from Animal Services, Behavioral Health, Public Guardian and Public Health

Return to the top of the page

Division Articles RSS News Feed

Environmental Health Supervisors

Leslie Terry

(805) 781-5553; [email protected]

  • Beach Water Quality, Cross-Connection, Land Use, Small Public Water Systems, Water Well Programs and Vector Programs

Aaron LaBarre

(805) 781-5595; [email protected]

  • Body Art, Food Protection, Swimming Pools and Spas.

Peter Hague 

(805) 781-5554; [email protected]

  • Hazardous Materials (CUPA) Programs
Sun shining over Avila Beach pier
Photo by Reeve Briscoe.

Annual Quarantine of Sport Harvested Mussels 2021

Author: California Department of Public health (CDPH)
Date: 4/26/2021 12:56:55 PM

Annual Quarantine of Sport-Harvested Mussels Notification

News Release

California Department of Public Health


Update 4/26/2021

PH17-041 CONTACT: Ali Bay or Corey Egel | 916.440.7259 | [email protected]

Annual Quarantine of Sport-Harvested Mussels Begins May 1

The mussel quarantine is a yearly event that happens due to dangerous levels of biotoxins that may be present in mussels gathered by the public anywhere on the California coast, including bays, inlets and harbors. The quarantine applies only to sport-harvested mussels; commercially grown mussels from certified companies are not included in the quarantine. The annual mussel quarantine is in place to protect the public against paralytic shellfish poisoning (PSP) and domoic acid poisoning (DAP), also known as Amnesic Shellfish Poisoning.

 The annual quarantine is normally in effect from May 1 through October 31. However, the California Department of Public Health (CDPH) may begin the quarantine early, or extend it, if monitoring results indicate the presence of dangerous levels of biotoxins outside of the normal quarantine period. The May through October quarantine period encompasses more than 99 percent of all PSP illnesses and deaths reported in California since 1927. The mussel quarantine is in effect from the Oregon border to the Mexican border. All bays, inlets and harbors are included.

The annual quarantine is in place so the public does not collect mussels during this high-risk period for marine toxins. The occurrence of biotoxins in mussels is unpredictable and they can increase in concentration very rapidly. Therefore, the annual quarantine period provides the best approach for protecting the public from these potentially deadly biotoxins.

 There are no known antidotes to the toxins found in mussels. Cooking does not reliably destroy the toxins.

 For additional information about the mussel quarantine: Mussel Quarantine Frequently Asked Questions[External] section.