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Public Health — Seattle & King County monitors drug overdose data to detect potential overdose clusters and identify emerging trends. Since most overdoses that occur are non-fatal, it is important to monitor trends of non-fatal overdose, as well as fatal overdose. On this page, you will find up-to-date information about overdoses treated by King County Emergency Medical Service (EMS) agencies and King County Emergency Departments (ED).

5/24/22: We have updated the methodology used to identify opioid overdoses in the EMS data and the dashboard reflects this. Please see the "Notes" tab for more detailed information about these changes.