A group of senators introduced a bill on July 25, 2017 in the hopes of banning Chlorpyrifos, a toxic pesticide implicated in the poisonings of farm workers. Introduced by Senator Tom Udall of New Mexico, the bill challenges President Trump’s efforts to loosen environmental regulations. 
Chlorpyrifos Ban and Recent History
- In April 2017, the EPA said it would not ban chlorpyrifos, despite the agency’s own chemical safety experts, who had recommended under the Obama administration that the pesticide be permanently banned from agricultural use nationwide, due to the dangers it poses to farm workers and young children.
- In 2015, the Obama-era EPA proposed a ban on agricultural use of chlorpyrifos, which had already been banned for household use in 2000.
- In late 2016, the EPA concluded that chlorpyrifos exposure was causing potentially significant health issues, including learning and memory declines, especially among farm workers and young children.
- On July 18, 2017, a federal appeals court denied a petition by green groups to force the EPA to ban chlorpyrifos. 
Several manufacturers produce chlorpyrifos, including Dow Chemical. It is listed as a neurotoxin by the CDC’s Agency for Toxic Substances and Disease Registry.
According to Philip Landrigan, a pediatrician who is dean for global health at the Icahn School of Medicine at Mount Sinai in New York, the toxicity of chlorpyrifos was proven “to damage the brains of children, especially those of fetuses in the womb” in 3 long-term, independently-funded studies “beyond a shadow of a doubt.”
Toxic residues of chlorpyrifos are regularly found on fruits and vegetables, including under the peels of oranges and other citrus fruits, as well as in the flesh of melons under the rind. Simply washing a piece of fruit before eating it is not enough to remove the pesticide. 
The EPA’s own scientists concluded that the amount of chlorpyrifos ingested by young children could exceed safety levels by 140 times.
The agency’s failure to ban chlorpyrifos could be construed as criminal, considering it is illegal under federal law to apply pesticides to food crops if the EPA can’t prove that they can be used safely.
Under the bill, the EPA would be required to conduct a broad review of the uses of chlorpyrifos to determine which groups are most vulnerable to the toxin. Should that review conclude that people are being exposed to harmful levels of the pesticide, EPA Administrator Scott Pruitt would be forced to take “appropriate regulatory action” within 3 months by either suspending or revoking chlorpyrifos’ registration, or lowering the amount that can be legally applied. 
“Congress must act because Administrator Pruitt has shown that he won’t.”
Senators Ben Cardin of Maryland, Kamala Harris of California, Richard Blumenthal of Connecticut, Cory Booker of New Jersey, Kirsten Gillibrand of New York, Richard Durbin of Illinois and Ed Markey of Massachusetts are co-sponsoring the piece of legislation.