Tesoro Corporation controversies
Controversies tied to this brand in public sources. A listing is not a finding of fault.
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2010
Anacortes refinery explosion
An explosion at Tesoro's Anacortes, Washington, refinery on April 2, 2010, killed seven workers. The incident generated significant scrutiny of refinery safety and workplace protections.
2010
Air pollution and Superfund scrutiny
Researchers identified Tesoro as a major corporate source of industrial air pollution, while the EPA named it as a potentially responsible party at several Superfund sites. The company settled or closed the sites in which it was involved.
2010
Support for California Proposition 23
Tesoro contributed more than $1 million in support of Proposition 23, an unsuccessful initiative that sought to suspend California's Global Warming Solutions Act of 2006. The contribution drew criticism from environmental organizations.