Tell the EPA to Ban Chlorpyrifos

Researchers who recently examined studies sponsored by Dow Chemical and used by the EPA to approve chlorpyrifos, a type of insecticide, found inaccuracies in what the company reported to the agency. 

To make matters worse, it appears that agency officials were warned by EPA toxicologists of the study’s problems. A memo sent to EPA management said that “The study was graded unacceptable due to an inadequate presentation of the statistical data analysis.”

Keep in mind, too, that the EPA is aware of evidence that found exposure to chlorpyrifos caused measurable differences in children’s brain function, on average dropping their IQs a few points. Some research has linked the pesticides to autism and other brain disorders. There’s also evidence to suggest that some children are more vulnerable to the chemicals than others due to their genetic makeup. These health effects should come as no surprise when we consider that chlorpyrifos were developed as a nerve gas during World War II by the Nazis, though they weren’t used in battle. Chemical weapons were prohibited by the Geneva Convention after WWI—so the chemical is too inhumane to use in war, but A-OK for our food, according to the government’s thinking.

The EPA is currently in the midst of a legal battle—to keep chlorpyrifos on the market. In August, the Ninth Circuit Court of Appeals ordered the EPA to ban the chemical; the EPA has appealed the decision.

Write to the EPA and to Congress, telling them to ban the use of chlorpyrifos on crops. 


  • Your Senators
  • Your Representative


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Please ban chlorpyrifos

Dear [Decision Maker],

[Your Name]
[Your Address]
[City, State ZIP]
[Your Email]