DCPA

October 22, 2024

EPA cancels pesticide shown to be harmful to unborn babies

By Carey Gillam

Citing a need to protect the unborn babies of pregnant women, the US Environmental Protection Agency (EPA) on Tuesday banned a pesticide used to kill weeds on farms, golf courses and athletic fields.

The action comes after years of mounting scientific evidence of the dangers posed by exposure to the chemical dimethyl tetrachloroterephthalate, also known as DCPA or Dacthal.

“With the final cancellation of DCPA, we’re taking a definitive step to protect pregnant women and their unborn babies,” Michal Freedhoff, assistant administrator for the EPA Office of Chemical Safety and Pollution Prevention, said in a press release. “The science showing the potential for irreversible harm to unborn babies’ developing brains, in addition to other lifelong consequences from exposure, demands decisive action to remove this dangerous chemical from the marketplace.”

The agency said “robust studies” demonstrated “thyroid toxicity,” and said that unborn babies whose pregnant mothers are exposed to DCPA could experience changes to fetal thyroid hormone levels. Such changes are “generally linked to low birth weight, impaired brain development, decreased IQ, and impaired motor skills later in life, some of which may be irreversible,” the EPA said.

DCPA was registered to control weeds in both agricultural and non-agricultural settings, but has largely been used to control weeds in fields growing crops such as broccoli, brussels sprouts, cabbage and onions.

August 6, 2024

EPA issues rare “emergency” suspension of dangerous weed killer

By Benjamin Purper

The US Environmental Protection Agency (EPA) on Tuesday said it was taking the rare step of issuing an “emergency suspension” of a chemical used to kill weeds on farms, golf courses and athletic fields, citing risks to unborn children.

The pesticide dimethyl tetrachloroterephthalate, known as DCPA or Dacthal, has been the subject of regulatory scrutiny for the last several years amid growing evidence of health harms from exposure.

“DCPA is so dangerous that it needs to be removed from the market immediately,” Michal Freedhoff, assistant administrator for the EPA Office of Chemical Safety and Pollution Prevention, said in a press statement. “It’s EPA’s job to protect people from exposure to dangerous chemicals. In this case, pregnant women who may never even know they were exposed could give birth to babies that experience irreversible lifelong health problems.”

Freedhoff said the suspension marks the first time in almost 40 years that the agency has used its emergency suspension authority to block continued use of a pesticide.

DPCA is primarily used on crops including broccoli, Brussels sprouts and cabbage, but it is also used in some non-agricultural settings including golf courses and athletic fields.

Today’s decision comes after years of research and smaller actions by the EPA to limit the impact of DCPA on public health. In April, the agency issued a rare warning that the pesticide posed “serious, permanent and irreversible health risks,” especially to farmworkers involved in tasks such as transplanting, weeding and harvesting after the pesticide has been applied.

The EPA said DCPA poses the highest risk to developing babies of pregnant mothers exposed to the pesticide, leading to conditions including low birth weight, impaired brain development, decreased IQ, and impaired motor skills later in life.

April 1, 2024

Concerned about developing babies, EPA warns about danger of weed killer used on farms, golf courses

By Johnathan Hettinger

The US Environmental Protection Agency (EPA) on Monday took the rare step of issuing a warning about “serious, permanent, and irreversible health risks” associated with a chemical used to kill weeds on farms and golf courses and athletic fields.

Citing “significant health risks to pregnant individuals and their developing babies,” the agency said farmworkers and others handling dimethyl tetrachloroterephthalate, more commonly known as DCPA, were at risk, as are people who might play on courses or fields recently sprayed with the pesticide.

The most serious risks extend to the developing babies of pregnant women, especially those handling DCPA products. The agency said pregnant women exposed to DCPA could experience changes to fetal thyroid hormone levels, which are linked to low birth weight, impaired brain development, decreased IQ, and impaired motor skills later in life. Though product labels say people should stay out of fields for 12 hours after they are sprayed with DCPA, the EPA said evidence indicates that in many cases, sprayed fields would be unsafe for 25 days or more. The agency additionally said that mothers and their developing babies could be at risk if they live near areas where DCPA is used because the pesticide can drift.

“EPA has determined that currently registered products containing the herbicide DCPA likely cannot be used under current label directions without posing serious risks of concern in humans,” Ed Messina, director of the Office of Pesticide Programs, stated in a letter to AMVAC, a California-based company that is the sole manufacturer of the pesticide.

The product is primarily used to control weeds on crops such as broccoli, Brussels sprouts, cabbage and onions, though it is also used in some non-agricultural settings. Last year, AMVAC agreed to end its use on turf, citing health concerns.

The EPA is currently reviewing whether to reapprove DCPA. Though the agency rarely takes the step of canceling a pesticide, it is considering that route, including suspending DCPA during review process, the agency said.

“Due to the serious potential risks posed by DCPA use, EPA will be pursuing these regulatory options as soon as practicable,” Messina wrote in the communication to AMVAC.