A significant release or threatened release of a hazardous material must be immediately reported to the California Governor’s Office of Emergency Services (Cal OES) State Warning Center at (800) 852-7550, and either the local Certified Unified Program Agency (CUPA) or 911.
To report all other environmental concerns, please use the California Environmental Protection Agency’s (CalEPA’s) online environmental complaint system.
(Page last updated 9/2/26)
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