Lawsuit Update Center
Our lawyers are reviewing chlorpyrifos pesticide lawsuits for people diagnosed with Parkinson’s disease after years of pesticide exposure. These cases are still early. But the science and litigation have moved fast in 2026, and the adult Parkinson’s claims now have a much stronger foundation than they did a year ago.
Chlorpyrifos is an organophosphate insecticide sold for decades under product names that included Lorsban and Dursban. It was used in agriculture, pest control, orchards, row crops, greenhouses, nurseries, turf, and some older residential pest control applications. The lawsuits allege that manufacturers and sellers knew, or should have known, that repeated chlorpyrifos exposure could damage the nervous system and increase the risk of Parkinson’s disease, but failed to give users a fair warning.
Talk to Our Chlorpyrifos Lawyers
If you were diagnosed with Parkinson’s disease after years of chlorpyrifos exposure, our lawyers can review your case and tell you whether it is worth pursuing. Contact our lawyers at 888-322-3010 or request a free consultation below.
What Is Chlorpyrifos?
Chlorpyrifos is an organophosphate insecticide. It was first registered in 1965 and has been used to kill insects on crops, turf, trees, and in some non-agricultural settings. It works by interfering with acetylcholinesterase, an enzyme needed for normal nervous system function.
That is the problem. A chemical designed to disrupt the nervous system of insects can also affect the human nervous system at sufficient exposure levels. EPA has long recognized that chlorpyrifos can cause cholinesterase inhibition in humans. High-level exposure can cause nausea, dizziness, confusion, respiratory problems, and, in extreme cases, death. The newer Parkinson’s claims focus on what repeated exposure may do to the brain over years.
Chlorpyrifos was sold in multiple formulations, including liquids, granules, wettable powders, and water-soluble packets. Products and brand names include Lorsban, Dursban, Cobalt, Lock On, and other chlorpyrifos-based insecticides. Product identification can be difficult because workers often remember the job, crop, sprayer, smell, or routine better than the label. That is normal. We help reconstruct exposure when the facts are there.
Who May Qualify for a Chlorpyrifos Lawsuit?
Our lawyers are mostly focused on Parkinson’s disease cases involving repeated, meaningful exposure. A good case usually involves direct handling of chlorpyrifos, not a vague memory of ordinary bug spray.
Our current screening criteria are:
- A diagnosis of Parkinson’s disease or a qualifying parkinsonism diagnosis.
- Direct chlorpyrifos exposure, usually from mixing, loading, spraying, applying, or working around applications.
- At least 20 total days of direct handling or repeated close exposure, although stronger cases usually involve far more than that.
- First chlorpyrifos exposure after 1965, when chlorpyrifos entered the pesticide market.
- Residential exposure only when it was substantial and usually before the early 2000s residential phaseout.
- Not a Raid-only case. A generic history of using ordinary household insect spray is usually not enough.
Chlorpyrifos Lawsuit Updates
First-Known Chlorpyrifos Parkinson’s Lawsuit Moves Into Federal Court
The first known chlorpyrifos pesticide Parkinson’s disease lawsuit was filed in June 2026 and removed to federal court in July 2026. The plaintiff alleges that years of mixing and applying chlorpyrifos products as a pest control worker caused his Parkinson’s disease. The Ramos federal docket lists Corteva, Corteva Agriscience, Dow Chemical, and FMC as defendants.
The plaintiff alleges that he worked for a pest control company from 1992 through 2015, personally mixed chlorpyrifos chemicals, applied the insecticide with truck-mounted equipment and handheld sprayers, and worked near other chlorpyrifos applications. He was diagnosed with Parkinson’s disease in 2017.
The complaint asserts negligence, strict product liability, failure to warn, design defect, and deceptive conduct claims. The defendants include Corteva, Corteva Agriscience, Dow Chemical, and FMC. The case was removed from Philadelphia state court to the Eastern District of Pennsylvania on July 17, 2026.
For plaintiffs, this is the starting gun. One filed case does not make a mature mass tort. But it gives future plaintiffs a model complaint, identifies core defendants, and frames the adult Parkinson’s theory around long-term occupational exposure.
Corteva Reports Asserted Lorsban Personal Injury Claims
In its March 31, 2026 SEC filing, Corteva reported asserted personal injury claims against former Dow AgroSciences involving chlorpyrifos exposure from Lorsban, an insecticide used by commercial farms for field fruit, nut, and vegetable crops. Corteva also reported that certain claimants have asserted remediation claims based on alleged property contamination.
The company’s disclosure says those claims include autism, developmental delays, decreased neurologic function, farmworker exposure, bystander drift, and in utero exposure. Corteva also stated that it had established an accrual for the estimated resolution of certain claims.
That does not tell us what Parkinson’s claims are worth. It does tell us that chlorpyrifos personal injury claims are not theoretical. The defendant is reporting them to investors and has booked an estimated resolution amount for certain claims.
UCLA Study Gives Parkinson’s Claims Their Strongest Science Yet
The new UCLA study is the development that changed the adult chlorpyrifos case. Researchers used California pesticide use data and lifetime residential and workplace addresses to estimate exposure. They then paired the human data with animal experiments using inhalation exposure, which is closer to how many workers and nearby residents encounter sprayed pesticides.
The study found long-term residential exposure associated with more than a 2.5-fold increased risk of Parkinson’s disease. The animal evidence matters to the legal case because it gives plaintiffs more than an epidemiology signal. The study found biological changes tied to Parkinson’s, including dopaminergic neuron loss and alpha-synuclein pathology.
Defendants will attack this study. They will argue about exposure estimates, dose, confounding pesticides, and whether animal findings translate to real-world human exposure. That is expected. But this is the kind of study that gives plaintiffs a real causation argument.
EPA Keeps Working Through Chlorpyrifos Restrictions After the Eighth Circuit Reversal
EPA revoked all chlorpyrifos tolerances in 2021, which stopped food use for a time. The Eighth Circuit later vacated that rule, and the tolerances were reinstated. EPA now says final cancellation orders remain in place unless amended, and chlorpyrifos tolerances remain in effect until EPA issues a final tolerance rule.
EPA’s current path is to retain tolerances only for 11 food and feed crop uses: alfalfa, apple, asparagus, tart cherry, citrus, cotton, peach, soybean, strawberry, sugar beet, and spring and winter wheat, with geographic and label restrictions. EPA has said the registration review process is ongoing, with more action expected in 2026.
The regulatory fight helps plaintiffs in one practical way: it shows that chlorpyrifos risk has been debated at a high level for years. It also makes defense arguments harder when they try to present chlorpyrifos as just another routine farm chemical.
What Is Chlorpyrifos?
Chlorpyrifos is an organophosphate insecticide. It was first registered in 1965 and has been used to kill insects on crops, turf, trees, and in some non-agricultural settings. It works by interfering with acetylcholinesterase, an enzyme needed for normal nervous system function.
That is the problem. A chemical designed to disrupt the nervous system of insects can also affect the human nervous system at sufficient exposure levels. EPA has long recognized that chlorpyrifos can cause cholinesterase inhibition in humans. High-level exposure can cause nausea, dizziness, confusion, respiratory problems, and, in extreme cases, death. The newer Parkinson’s claims focus on what repeated exposure may do to the brain over years.
Chlorpyrifos was sold in multiple formulations, including liquids, granules, wettable powders, and water-soluble packets. Products and brand names include Lorsban, Dursban, Cobalt, Lock On, and other chlorpyrifos-based insecticides. Product identification can be difficult because workers often remember the job, crop, sprayer, smell, or routine better than the label. That is normal. We help reconstruct exposure when the facts are there.
Who Is Most Likely to Have a Strong Chlorpyrifos Case?
The strongest chlorpyrifos Parkinson’s lawsuits will usually involve people who handled or worked close to the pesticide repeatedly. These claims are easier to prove when exposure was part of the job, not a one-time event.
| Exposure Group | Why the Claim May Be Strong | Proof We Want to See |
|---|---|---|
| Pesticide applicators and exterminators | Mixing, loading, spraying, truck-mounted applications, and handheld applications can create repeated inhalation and skin exposure. | Employment records, applicator license, product labels, invoices, job logs, coworker witnesses, and diagnosis records. |
| Farmworkers and crop workers | Workers may have entered treated fields, handled treated crops, worked near drift, or performed tasks shortly after application. | Crop, county, employer, years worked, pesticide use records, field location, and medical records. |
| Mixers, loaders, and equipment operators | Concentrated product handling is often stronger proof than distant or casual exposure. | Application records, training records, product purchase records, safety data sheets, and witness statements. |
| People living near treated fields | Drift and long-term residential proximity may matter, especially in agricultural communities with heavy chlorpyrifos use. | Addresses, years of residence, nearby crops, pesticide use data, and Parkinson’s diagnosis records. |
| Older residential Dursban exposure | Residential claims can exist, but they usually need stronger facts because most indoor uses ended years ago. | Pest control records, invoices, home treatment dates, product name, family witness statements, and diagnosis records. |
Chlorpyrifos and Parkinson’s Disease
Parkinson’s disease is a progressive neurological disorder. The classic symptoms are tremor, stiffness, slowed movement, balance problems, changes in gait, smaller handwriting, reduced facial expression, voice changes, constipation, sleep disturbance, depression, and loss of smell. Not every patient has the same symptoms, and not every tremor is Parkinson’s disease.
The legal question is not whether chlorpyrifos can cause short-term poisoning. That is old news. The stronger fight is whether repeated chlorpyrifos exposure can contribute to Parkinson’s disease years later. Plaintiffs now have a much better argument because the 2025 UCLA study ties exposure to human Parkinson’s risk and then shows biological plausibility in animal models.
This does not mean every person with Parkinson’s disease who ever lived near a farm has a case. Defense lawyers will look for other risk factors, other pesticide exposures, family history, weak product identification, and gaps in proof. That is why our intake focuses heavily on the details of how, when, and where you were exposed.
Children’s Neurodevelopmental Chlorpyrifos Claims
This page is mainly about adult Parkinson’s disease claims. But chlorpyrifos litigation also includes claims involving children exposed before birth or early in life. Corteva’s own SEC disclosure describes asserted claims involving autism, developmental delays, decreased neurologic function, farmworker exposure, bystander drift, and in utero exposure.
These child injury cases are different from adult Parkinson’s claims. The exposure window is different. The medical proof is different. The statute of limitations issues are different. If the child’s mother lived or worked near chlorpyrifos applications during pregnancy, or if a child was exposed through a home, field, school, or agricultural community, the case needs a separate review.
Older chlorpyrifos cases, including Roberti v. Andy’s Termite, show that plaintiffs have been litigating child brain injury theories involving Dursban for decades. Those cases do not prove every modern claim. But they show that the core concern, chlorpyrifos and the developing nervous system, is not new.
What the Chlorpyrifos Lawsuits Allege
Chlorpyrifos lawsuits allege that manufacturers and sellers put a dangerous pesticide into the market without giving workers, applicators, families, and communities an honest warning about long-term neurological risk.
The core allegations are that defendants:
- Failed to adequately study long-term neurological effects in adults.
- Failed to warn that repeated exposure may increase the risk of Parkinson’s disease.
- Marketed chlorpyrifos products as safe when used in foreseeable work settings.
- Sold products that were defectively designed because safer alternatives were available.
- Minimized, delayed, or failed to disclose adverse health information.
- Continued selling chlorpyrifos despite mounting evidence of neurotoxicity.
The failure-to-warn claim is the cleanest legal theory in many cases. If a worker had been warned that repeated chlorpyrifos exposure could contribute to Parkinson’s disease, that worker might have used different protective equipment, refused certain jobs, changed application methods, or avoided the product entirely.
Potential Defendants in Chlorpyrifos Lawsuits
The main defendants in chlorpyrifos pesticide lawsuits are expected to include companies involved in designing, manufacturing, formulating, distributing, and selling chlorpyrifos-based products. The Ramos case names Corteva Inc., Corteva Agriscience LLC, The Dow Chemical Company, and FMC Corporation.
Dow brought chlorpyrifos to market decades ago. Dow AgroSciences later became part of the corporate history now tied to Corteva. FMC and other entities may be implicated depending on the product, time period, formulation, and distribution chain. In some cases, local applicators, pest control companies, growers, or property owners may also be involved, but the primary product liability claims are aimed at the companies responsible for the pesticide.
Do not get stuck because you do not know the exact defendant. Most people do not. Tell us where you worked, what you did, the crops or properties involved, the years of exposure, and anything you remember about product names or containers. The product record search comes after that.
Chlorpyrifos Regulation and Ban History
Chlorpyrifos has one of the messiest regulatory histories of any pesticide still being discussed in litigation. EPA has reviewed it for decades. States have acted on their own. Federal courts have pushed EPA in different directions. Manufacturers have also withdrawn or limited some products.
| Year | Event | Why Plaintiffs Care |
|---|---|---|
| 1965 | Chlorpyrifos enters the pesticide market. | This is the starting point for exposure history. A claimed exposure before chlorpyrifos existed is not a chlorpyrifos case. |
| 1995 | EPA fines DowElanco for failing to timely report adverse health information involving pesticides, including chlorpyrifos. | This goes to notice. Plaintiffs will use this history to argue that neurological concerns were known long before the new Parkinson’s filings. |
| Early 2000s | Most residential indoor uses were phased out. | Residential exposure cases usually need older treatment records, pest control records, or strong witness proof. |
| 2020 | Corteva ended production of Lorsban. California moved to end chlorpyrifos sales and grower possession. | The end of production and state restrictions help show the product was under serious pressure before the Parkinson’s litigation began. |
| 2021 | EPA revoked all chlorpyrifos tolerances, which effectively stopped food use for a time. | EPA’s action supports the broader argument that aggregate chlorpyrifos exposure could not be brushed aside as harmless. |
| 2023 | The Eighth Circuit vacated EPA’s 2021 tolerance revocation rule. | Defense lawyers will cite this. Plaintiffs will respond that the ruling was about EPA procedure and scope, not a clean bill of health. |
| 2024 and 2025 | EPA issued cancellation orders and proposed revoking most food tolerances while retaining only 11 crop uses with restrictions. | The shrinking lawful use profile supports the plaintiff theme that chlorpyrifos was never an ordinary risk free pesticide. |
| 2026 | The first known Parkinson’s lawsuit is filed | The litigation is now moving from scientific concern to filed product liability claims. |
Is Chlorpyrifos Still Used?
Yes, but not the way it once was. Chlorpyrifos is now heavily restricted. EPA says final cancellation orders remain in place unless amended, and the agency has proposed retaining tolerances only for 11 food and feed crop uses with state and label restrictions. Some states have gone further and banned or phased out chlorpyrifos use.
For lawsuit purposes, the bigger issue is historical exposure. Most Parkinson’s cases will involve exposure years before diagnosis. Parkinson’s disease often develops slowly, and pesticide exposure cases usually look back over decades.
What Compensation Can a Chlorpyrifos Lawsuit Seek?
A chlorpyrifos lawsuit may seek compensation for medical bills, future treatment, lost wages, reduced earning capacity, pain and suffering, loss of enjoyment of life, home care, mobility needs, and the burden Parkinson’s disease places on a family.
In the strongest cases, punitive damages may also be part of the claim. Punitive damages are not automatic. They depend on state law and proof that the defendant’s conduct was more than simple negligence. The long regulatory history, adverse event reporting history, and alleged failure to warn will be central to that fight.
What Proof Do You Need?
You do not need to have every record before calling a lawyer. Most people do not have pesticide labels from 20 years ago sitting in a drawer. But if you have details, that helps.
| Proof Category | Examples |
|---|---|
| Diagnosis proof | Neurology records, Parkinson’s diagnosis date, medication history, movement disorder specialist notes, disability records, and symptom timeline. |
| Work history | Employer names, years worked, job duties, crops, properties treated, counties, applicator roles, and coworkers who can confirm exposure. |
| Product proof | Labels, invoices, purchase records, safety data sheets, product containers, pesticide use reports, crop spray records, and employer chemical lists. |
| Residential proof | Past addresses, field proximity, pest control invoices, treatment records, old lease or home records, and state pesticide use data where available. |
Why Product Identification Is So Important
This is where pesticide cases get hard. Many workers know they sprayed insecticides for years, but they do not remember the product name. That is not fatal, but it creates work.
A strong chlorpyrifos lawsuit needs evidence that the pesticide was actually chlorpyrifos, not just a different insecticide. We look for the job, employer, crop, time period, location, and application pattern. In states like California, pesticide use records can be especially helpful. In other states, we may need employment files, invoices, coworker statements, or historical product records.
This is also why a Raid-only claim usually fails screening. Ordinary household insect spray exposure, without proof of chlorpyrifos, is not enough. The best cases involve commercial, agricultural, or professional pest control exposure where the product can be reconstructed.
How Our Lawyers Evaluate a Chlorpyrifos Case
When you contact our lawyers, we look for the facts that determine whether this is a real case. We want to know your diagnosis, when symptoms started, when you were diagnosed, where you worked, what you sprayed, how often you handled pesticides, and whether anyone can confirm the work.
The first conversation is not a deposition. You do not need perfect answers. But be specific where you can. A statement like “I sprayed Lorsban on citrus for eight seasons in Fresno County” is much more useful than “I used farm chemicals.”
If the case looks viable, we then work on records. That may include medical records, employment records, pesticide use records, applicator records, product labels, and witness statements. You should not have to solve the whole case before asking for help.
Chlorpyrifos Lawsuit FAQ
What is a chlorpyrifos lawsuit?
A chlorpyrifos lawsuit is a product liability claim alleging that exposure to chlorpyrifos caused Parkinson’s disease, neurodevelopmental injury, or another neurological harm, and that manufacturers failed to properly warn users about the risk.
Who qualifies for a chlorpyrifos Parkinson’s disease lawsuit?
The best candidates are people diagnosed with Parkinson’s disease after repeated chlorpyrifos exposure, especially pesticide applicators, farmworkers, mixers, loaders, pest control workers, and people who lived near heavy agricultural spraying.
How much chlorpyrifos exposure do I need?
Our lawyers are generally looking for at least 20 total days of direct handling or repeated close exposure. Stronger cases usually involve years of work around chlorpyrifos products, not one isolated exposure.
Can I file a chlorpyrifos lawsuit if I do not remember the product name?
Maybe. Product identification is easier when you remember names like Lorsban, Dursban, Cobalt, or Lock On. But if you know your employer, crops, county, years worked, and job duties, lawyers may be able to reconstruct the exposure through records and witnesses.
Is chlorpyrifos linked to Parkinson’s disease?
Yes, there is now serious scientific evidence linking chlorpyrifos exposure to Parkinson’s disease risk. The 2025 UCLA study found more than a 2.5-fold increased Parkinson’s risk with long-term residential exposure and also found biological evidence in animal models. Defendants will still fight causation hard.
Are there chlorpyrifos settlement amounts yet?
There are no reliable published average settlement amounts for chlorpyrifos Parkinson’s disease lawsuits yet. The cases are too new. Early value estimates depend on proof of exposure, diagnosis, disability, lost income, age, jurisdiction, and how courts treat the science.
Is chlorpyrifos banned?
Chlorpyrifos is heavily restricted, and some states have banned or phased out its use. EPA’s current position is more complicated because the Eighth Circuit vacated the 2021 rule that revoked all food tolerances. EPA is now working through a narrower tolerance and registration review process.
Can I sue if I was diagnosed years ago?
Possibly. The defense may argue that the deadline started at diagnosis, but plaintiffs may have discovery rule arguments because many people did not know chlorpyrifos was connected to Parkinson’s disease until recently. You need a lawyer to quickly review the state-law deadline.
Are child autism or developmental delay cases part of the chlorpyrifos litigation?
Yes, but they are a different track from adult Parkinson’s claims. Child cases usually involve in utero or early childhood exposure and require different medical and exposure proof.
Get Your Chlorpyrifos Exposure Reviewed
If you handled chlorpyrifos, worked around pesticide applications, or lived near heavy spraying and later developed Parkinson’s disease, do not guess about whether you have a claim. Let our lawyers review your exposure history and tell you where you stand. Contact our lawyers at 888-322-3010.
