California Seeks to Ban Chlorpyrifos-Containing Pesticides

The state’s Environmental Protection Agency says that evidence of the chemical’s link to neurological problems in children is overwhelming.

Written byJef Akst
| 2 min read

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Following a 2017 decision by the US Environmental Protection Agency (EPA) not to prohibit the use of pesticides containing an organophosphate known as chlorpyrifos, California’s own EPA has initiated steps toward a statewide ban.

“This pesticide is a neurotoxin,” California Environmental Secretary Jared Blumenfeld tells the Associated Press. Because the federal government has allowed its continued use, California is joining Hawaii, New York, Oregon, Connecticut, and New Jersey, which have all approved bans or have bills under consideration to remove chlorpyrifos from the market, in taking matters into its own hands. The California ban, or cancellation, could take up to two years to go into full effect.

California Governor Gavin Newsom (D) “has done what the Trump administration has refused to do: protect children, farmworkers and millions of others from being exposed to this neurotoxic pesticide,” Ken Cook, president of the Environmental Working Group, says in ...

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  • Jef (an unusual nickname for Jennifer) got her master’s degree from Indiana University in April 2009 studying the mating behavior of seahorses. After four years of diving off the Gulf Coast of Tampa and performing behavioral experiments at the Tennessee Aquarium in Chattanooga, she left research to pursue a career in science writing. As The Scientist's managing editor, Jef edited features and oversaw the production of the TS Digest and quarterly print magazine. In 2022, her feature on uterus transplantation earned first place in the trade category of the Awards for Excellence in Health Care Journalism. She is a member of the National Association of Science Writers.

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