Chlorpyrifos Lawsuit: Do You Qualify for Compensation?

Plaintiffs allege that manufacturers and sellers knew or should have known that pesticides containing chlorpyrifos could damage the nervous system, but failed to provide adequate warnings about long-term neurological risks. Adult plaintiffs claim repeated exposure contributed to Parkinson’s disease, while other lawsuits argue that children exposed to the pesticide developed neurodevelopmental injuries.

According to lawsuits, chlorpyrifos affects the human brain the same way it works on the brains of insects, leading to Parkinson’s disease and other neurological problems. Based on this evidence, lawsuits claim insecticide manufacturers knew or should have known that chlorpyrifos could pose a danger to humans, yet continued to sell their products without properly warning people.

Who Are the Defendants?

The defendants in any chlorpyrifos lawsuit depend on the product, manufacturer, distributor, employer or applicator connected to the alleged exposure. Filed by Alexander Ramos in June 2026, one of the most recent lawsuits named Corteva, Inc., Corteva Agriscience LLC, The Dow Chemical Company and FMC Corporation as defendants. Earlier child-injury cases named Dow, Corteva and local entities involved in pesticide application.

The main qualifiers for a chlorpyrifos lawsuit include exposure to chlorpyrifos, along with a diagnosis of Parkinson’s disease in adults or neurodevelopmental disorders in children. Whether you qualify depends on the specific facts of your case.

Generally, potential claimants must have experienced chlorpyrifos exposure for at least five days in Washington, California, Pennsylvania or Illinois. Pesticides included in chlorpyrifos lawsuits include Lorsban, Bolton, Stallion, Govern, Hatchet, Vulcan, Warhawk, Whirlwind, Yuma, Cobalt Advanced, Match-Up and Duret.

Parkinson’s Disease Diagnosis and Long-Term Exposure

If you were a farm or agricultural worker diagnosed with chlorpyrifos complications like Parkinson’s disease after long-term exposure, you may qualify to file a lawsuit. Gather documentation and evidence of the duration of your pesticide exposure, job duties, crops or properties treated, application methods, protective equipment used and product names.

A December 2025 study published in Molecular Neurodegeneration analyzed 829 people with Parkinson’s disease and 824 control subjects, estimating chlorpyrifos exposure using California pesticide-use records and residential history. Researchers noted that people with long-term residential and workplace exposure to chlorpyrifos had more than 2.5 times the risk of Parkinson’s disease.

Neurodevelopmental Harm and Birth Injury in Children

Parents of children who experienced serious developmental and neurological problems after chlorpyrifos exposure may qualify if exposure occurred during pregnancy or early childhood. Typically, the child must have experienced chlorpyrifos exposure by their fourth birthday to qualify for a lawsuit.

Cases filed in California have included allegations involving autism, ADHD, communication difficulties, vision problems and other lasting conditions. It’s helpful to have documentation of your child’s diagnosis and school paperwork about any special programs or assistance your child may need.

Qualifying Occupations and Exposure Settings

Potential claimants may include farmworkers, pesticide applicators, pest-control workers, groundskeepers and people who mixed, loaded, sprayed or cleaned chlorpyrifos equipment. Attorneys may also investigate exposure histories for residents who lived near agricultural applications, family members who handled contaminated work clothing and children exposed during pregnancy or early life.

If you don’t remember the chemical name, it doesn’t automatically disqualify you. Workers may remember a trade name such as Lorsban or Dursban, a container color, the crop, the employer or the years of use. Lawyers may be able to help you track down the specific products that caused your exposure.

If your doctor diagnoses you with Parkinson’s disease after chlorpyrifos exposure, or your child develops a neurological or developmental disorder, seek a free case review from an experienced lawyer. Prepare for this review by collecting some important documents that support your claim.

Even if you don’t think you qualify, you should still contact a lawyer. Qualification depends on the facts of your case, and only an attorney can tell you for sure if you’re eligible.

Every state limits the time available to file a lawsuit, but there is no specific statute of limitations for chlorpyrifos claims.

Generally, the applicable deadline depends on where the exposure occurred, where the plaintiff lives, the defendants, the type of claim and when the plaintiff discovered the injury or illness. Rules for minors may differ from rules for adults.

So far, recent litigation is in the early stages, and there haven’t been any global settlements or trials. Chlorpyrifos litigation includes older child-neurodevelopment claims and newer Parkinson’s claims.

Corteva’s March 2026 SEC filing disclosed asserted personal injury claims involving former Dow AgroSciences chlorpyrifos products. In June 2026, Alexander Ramos filed a complaint in Philadelphia alleging that occupational exposure from 1992 to 2015 contributed to Parkinson’s disease diagnosed in 2017.

No Formal MDL — Individual Claims Status

So far, there is no evidence of plaintiffs filing a motion to consolidate these cases into multidistrict litigation (MDL). Claims are proceeding individually in their respective state courts.

Current litigation is in the early stages, and there haven’t been any settlements or jury verdicts. Any potential compensation depends on the evidence, injuries and laws governing the case.

A plaintiff may seek damages for past and future medical care, lost income, diminished earning capacity, pain and suffering, disability and other documented losses. Parents may seek costs related to a child’s treatment, therapy, education and long-term support when permitted by state law.

In March 2026, Corteva announced it was setting aside an undisclosed amount of money to resolve certain Lorsban chlorpyrifos lawsuits brought against the former Dow AgroSciences LLC.