CalEPA Timeline

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Protecting California's Air, Water, Food, and Land

CalEPA was formally established on July 17, 1991. As we celebrate our 30 years in operation, we also elevate events and accomplishments that took place decades earlier that laid the agency’s foundation as a global leader on climate action, protecting the food supply from harmful pesticides, building a circular economy, environmental health, cleaning up toxics and ensuring high quality water supplies. 

History Pages of CalEPA and its Departments

California Environmental Protection Agency

California Air Resources Board




Department of Pesticide Regulation

Department of Toxic Substances Control


Office of Environmental Health Hazard Assessment


State Water Resources Control Board

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ARB public site
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DTSC site
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DTSC twitter
CalRecycle facebook
Calrecycle twitter
OEHHA site
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OEHHA twitter
cdpr site
cdpr facebook
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Waterboard Twitter