agrochemicals Archives

November 1, 2024

US Congress members call on EPA to ban paraquat, citing risk of Parkinson’s and other diseases

By Carey Gillam

More than 50 US lawmakers are calling on the Environmental Protection Agency (EPA) to join dozens of other nations in banning a widely used weed killer linked to Parkinson’s disease and other health dangers.

In an Oct 31 letter to the agency, seven US senators said that paraquat, a weed killer commonly applied on US farms, was a “highly toxic pesticide whose continued use cannot be justified given its harms to farmworkers and rural communities.” The call for a ban from the senators came after 47 members of the US House of Representatives sent a similar letter to the EPA calling for a ban earlier in October.

The lawmakers cite scientific links between paraquat use and development of Parkinson’s and other “life threatening diseases” as well as “grave impacts on the environment”. The lawmakers note that approximately 70 countries have banned paraquat.

“Numerous studies” have found that paraquat causes “serious health risks for workers who use the substance as well as the surrounding communities,” the lawmakers wrote. “These health risks include a higher risk of Parkinson’s disease, with some studies finding a 64% increase in the likelihood of developing Parkinson’s, non-Hodgkin’s Lymphoma, thyroid cancer, and other thyroid issues.”

Sen. Cory Booker, organizer of the Senate letter, said the risks of paraquat exposure are “well documented” and that it is “irresponsible” for the EPA to continue to allow its use. “I hope the EPA will follow the science and ban paraquat,” Booker said.

The congressional letters add to mounting pressure on the EPA to remove paraquat from the market.

October 27, 2022

Amid calls for ban on weed killer linked to Parkinson’s, a battle over science

By Carey Gillam

When US regulators issued a 2019 assessment of the widely used farm chemical paraquat, they determined that even though multiple scientific studies linked the chemical to Parkinson’s disease, that work was outweighed by other studies that did not find such links. Overall, the weight of scientific evidence was “insufficient” to prove paraquat causes the brain disease, officials with the US Environmental Protection Agency (EPA) declared.

The EPA reiterated its assessment in a 2021 report. The agency said after extensive analysis of numerous factors, including concerns about Parkinson’s risk, it determined farmers could safely continue to apply the weed killer across millions of US acres to help in the production of soybeans, corn, cotton and an array of other crops.

The determination has been significant for Syngenta, the longtime maker of paraquat weed killers. The company is facing calls in the US for a paraquat ban, as well as more than 2,000 legal claims brought by farmers and others alleging they developed Parkinson’s disease because of their exposure to paraquat.

Syngenta cites the EPA assessment of the science on paraquat in defense of the pesticide, and says scientific research “does not support” a causal relationship between the chemical and the disease. On a Syngenta-run paraquat information website, the company highlights several studies it says also backs that position, including many conducted by company scientists or by outside scientists who received company funding for their work.

Last week the Guardian and The New Lede reported that internal corporate records show Syngenta had knowledge of science linking paraquat to Parkinson’s decades ago but sought both to refute the evidence with various secret tactics. The documents are available at the Paraquat Papers Media Library.

US farmworker, health and environmental advocacy groups say in contrast to the corporate science, research conducted by independent scientists provides abundant evidence of paraquat’s ability to cause Parkinson’s and other health dangers, and the EPA is improperly discounting that body of research.

More than 50 groups have called for the US to follow the lead of dozens of other countries in banning paraquat. The Michael J. Fox Foundation for Parkinson’s Research submitted a petition to the EPA with 107,000 signatories calling for a ban. The foundation cited a study that found people exposed to paraquat in their teens or as young adults had an increased Parkinson’s risk of 200 to 600 percent, depending on the overall exposure.

March 17, 2022

More than 50% of tested U.S. rivers, lakes, and ponds heavily polluted, research shows

More than 700,000 miles of America’s rivers, streams and creeks and more than 11 million acres of lakes, ponds and reservoirs are so excessively polluted that they are classified as “impaired,” according to a new report by the Environmental Integrity Project (EIP).

The tally means that more than 50 percent of assessed river and stream miles and 55 percent of lake acres are so heavily polluted or otherwise impacted that they are not safe for swimming and fishing or as drinking water sources. The same is true for a quarter of assessed bay and estuary square miles, according to the report.