Overdose Surveillance and Response in San Diego County

Last updated 11/25/2024.

About the Overdose Surveillance and Response (OSAR) Program

In response to the need for a comprehensive drug overdose surveillance and response system, the County of San Diego created the Overdose Surveillance and Response (OSAR) program in the fall of 2023. This program is a collaborative effort between County Health and Human Services Agency, Public Health Services, and Behavioral Health Services, with support from the County Medical Examiner's Office and County Emergency Medical Services.

The program's design is centered around three main pillars:

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  • Surveillance focuses on the monitoring of overdose data across the County, analyzing it to detect crisis events, identifying geographic hotspots, and tracking trends in substance use. 
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  • Investigation and Response efforts are initiated as geographic clusters and data spikes are identified, including street-level outreach in affected areas to provide harm reduction supplies such as naloxone (an opioid overdose reversal medication) and fentanyl test strips, along with health and community-based referrals.
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  • Community Engagement involves raising awareness of the risks of substance use, promoting harm reduction strategies, and connecting individuals with local resources.

Contact the Overdose Surveillance and Response program via email at PHS.OSAR.HHSA@sdcounty.ca.govor call the Epidemiology Unit at (619) 692-8499, for more information.