The state's action rejects that ruling.
"The proposed regulation would state that drinking coffee does not pose a significant cancer risk, despite the presence of chemicals created during the roasting and brewing process that are listed under Proposition 65 as known carcinogens," the agency said in a statement. "The proposed regulation is based on extensive scientific evidence that drinking coffee has not been shown to increase the risk of cancer and may reduce the risk of some types of cancer."
Attorney Raphael Metzger, who won the court case on behalf of The Council for Education and Research on Toxics, said he was shocked the agency would move to nullify the court decision and undermine its own report more than a decade ago that drinking even small amounts of coffee resulted in a significant cancer risk.
"The takeaway is that the state is proposing a rule contrary to its own scientific conclusion. That's unprecedented and bad," Metzger said. "The whole thing stinks to high hell."
The National Coffee Association had no comment on the proposed change. In the past, the organization has said coffee has health benefits and that the lawsuit made a mockery of the state law intended to protect people from toxics.
Scientific evidence on coffee has gone back and forth over many years, but concerns have eased recently about possible dangers, with some studies finding health benefits.
Big Coffee didn't deny that acrylamide was found in the coffee, but argued it was only found at low levels and was outweighed by other benefits such as antioxidants that reduce cancer risk.
The state agency's action comes about a week after bipartisan bills were introduced in both houses of Congress to require science-based criteria for labels on food and other products. One of the sponsors, Rep. Kurt Schrader, D-Oregon, alluded to the California coffee lawsuit as an example of misleading warnings.
"When we have mandatory cancer warnings on a cup of coffee, something has gone seriously wrong with the process," Schrader said in a news release. "We now have so many warnings unrelated to the actual health risk posed to consumers, that most people just ignore them."
The lawsuit against Starbucks and 90 companies was brought by the tiny nonprofit under a law that allows private citizens, advocacy groups and attorneys to sue on behalf of the state and collect a portion of civil penalties for failure to provide warnings.
The Safe Drinking Water and Toxic Enforcement Act, better known as Proposition 65, requires warning labels for about 900 chemicals known to cause cancer or birth defects.
The law has been credited with reducing cancer-causing chemicals, but it has been criticized for leading to quick settlement shakedowns and vague warnings that are often ignored.