Sandy Fire Air Monitoring Update - Due to the Sandy Fire’s proximity to the Santa Susana Field Laboratory (SSFL), hazardous materials and radiological monitoring teams continue proactive air quality and radiation monitoring operations around the fire area.
Currently, seven air sampling radiological monitoring locations have been established surrounding the incident, including the Chatsworth, Lake Manor, Bell Canyon, Oak Park, and Simi Valley areas. These monitoring systems are being used to establish background environmental conditions and to continuously evaluate smoke and air quality conditions as firefighting operations continue.
The Sandy Fire has NOT reached the Santa Susana Field Laboratory property, and there is currently no indication that any radiological material has been released from the site. The attached drone video shows the current fire perimeter in relation to the SSFL area.
Public health and environmental agencies, including Ventura County Public Health, the Los Angeles County Department of Public Health, California Department of Toxic Substances Control (DTSC), Ventura County Air Pollution Control District, and the U.S. Department of Energy, remain actively engaged in monitoring conditions and supporting incident operations.
The U.S. Department of Energy is supporting air monitoring operations around the SSFL out of an abundance of caution. Radiation measurements collected as recently as 2025, along with modeling conducted following the 2018 Woolsey Fire, continue to indicate that the extremely low levels of residual radioactive material at the site pose no risk to public health, even in the event wildfire activity reaches the area.
The SSFL is located in an area historically prone to wildfires, including the 2018 Woolsey Fire. Following that fire, air, soil, and ash sampling conducted by DTSC did not detect the release of chemical or radiological contaminants from the site. Additionally, radiological assessments conducted by the Los Angeles County Department of Public Health found no discernible levels of radiation in tested areas surrounding the site.
Residents can continue monitoring local smoke and air quality conditions using the AirNow Fire and Smoke Map:
fire.airnow.gov/?lang=en#12.…
About the video: The background map shows the drone location as a circle with a blue arrow. The blue line shows the flight path of the drone, while the moving polygon represents the area the drone camera is viewing. The left screen displays the thermal imaging view, and the right screen shows the normal video footage. This video demonstrates that the fire did not reach the Santa Susana Field Laboratory property.
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