California Bans Paraquat: Toxic Herbicide Outlawed in 70+ Countries 2026

California has officially banned paraquat, a highly toxic herbicide linked to Parkinson's disease, marking a major victory for public health advocates. The decision makes California the second US state to prohibit the substance, following Vermont, and comes after years of pressure from environmental and farmworker groups.

What Is Paraquat and Why Is It Dangerous?

Paraquat is one of the most acutely lethal pesticides ever created. It is a non-selective herbicide used to control weeds in a variety of crops, including grapes, almonds, pistachios, and soybeans. Despite its widespread use, paraquat has been linked to severe health issues, including Parkinson's disease, cancer, and organ failure. There is no antidote for paraquat poisoning, and even a single sip can be fatal, as highlighted by the EPA's own warning: 'One Sip Can Kill.'

Health Risks of Paraquat Exposure

Exposure to paraquat can occur through skin contact, inhalation, or ingestion. The health consequences are severe and often irreversible. Research has shown that paraquat interferes with dopamine production, which is directly linked to the development of Parkinson's disease. Other health effects include:

• Increased risk of Parkinson's disease
• Cancer, particularly lung and skin cancer
• Heart failure and kidney failure
• Liver damage and scarring of the lungs
• Acute poisoning leading to death

Global Ban vs. US Approval

Paraquat is already outlawed in more than 70 countries, including China, the UK, and the European Union. However, the US Environmental Protection Agency (EPA) reapproved its use in 2021 and again in 2024, citing its effectiveness in agriculture. This has created a stark contrast between US policy and global standards.

California's Landmark Decision

California is the largest user of paraquat in the US, applying millions of pounds annually to crops in the Central Valley and other regions. The state's decision to ban the herbicide is a significant win for public health and environmental justice. The ban follows a 2024 state law that required the pesticide division to re-evaluate paraquat's health risks. Nathan Donley, environmental health science director at the Center for Biological Diversity, called the decision 'very welcome news' and noted that it happened faster than expected.

Key Takeaways

• California has banned paraquat, making it the second US state to do so.
• Paraquat is linked to Parkinson's disease and other severe health conditions.
• More than 70 countries have already outlawed the herbicide.
• The EPA continues to approve paraquat despite mounting evidence of harm.
• This ban could pressure other states and the federal government to act.

FAQ