by Julie Fidler, Natural Society:
As of July 7, 2017, glyphosate, a chemical found in Monsanto’s RoundUp herbicide, has officially been listed as a carcinogen in California under the state’s Proposition 65 law. 
Under the law, RoundUp, the most widely-used herbicide in the world, must carry a warning about its potential to cause cancer in humans. It is the first time that any governmental authority has created such legislation based on glyphosate’s possible carcinogenicity.
The California Office of Environmental Health Hazard Assessment (OEHHA) must still complete the task of setting a limit for acceptable daily exposure to the weedkiller. Agency scientists have proposed a limit of 1.1 mg a day, which is 127 times less than the U.S. Environmental Protection Agency’s (EPA) legal allowance for the average-sized adult.
Ken Cook, president of the Environmental Working Group (EWG) said:
“With this action today listing glyphosate as a cancer-causing chemical, California continues to lead the nation in implementing laws to protect human health and the environment. This is a significant blow to Monsanto, but a victory on behalf of the public, which could set the stage for similar actions in other states across the nation.”
EWG says the law doesn’t go far enough, and believes the OEHHA should set a daily limit of 0.01 mg of glyphosate, which would protect all Californians, including the state’s most vulnerable population: children. The lower estimate is based on a recent analysis by EWG.
“While we applaud today’s action, we do believe the state can take additional steps to further protect its most vulnerable populations from this dangerous chemical.”