Nationwide Case Review · 2026
Diagnosed With Parkinson's After Chlorpyrifos Exposure?
Cornerstone Law Can Help.
After years of scientific debate over neurodevelopmental harm, chlorpyrifos exposure claims are now active in state courts in California and New York. Farmworkers, applicators, and residents with a documented Parkinson's disease or Parkinsonism diagnosis may qualify. Cornerstone Law is reviewing cases nationwide — with no upfront cost to you.
Chlorpyrifos is an organophosphate insecticide long used on fruits, vegetables, and row crops, sold for decades under brand names like Dursban and Lorsban. The EPA issued a final rule in 2021 revoking all food-use tolerances, but that rule has since been challenged and partially rolled back, leaving the regulatory landscape unsettled. Civil litigation has emerged alongside that regulatory fight, with plaintiffs alleging manufacturers knew of neurotoxic and developmental risks and failed to adequately warn workers, applicators, and the public.
No MDL Yet
Individual cases filed in state court
CA & NY
Leading jurisdictions, more states under investigation
2024–2026
Active filing and investigation window
Active
Discovery underway in early cases
Qualifying Products
Which Chlorpyrifos Products May Be Involved?
There's no single product simply called "chlorpyrifos," but many people who worked with or around it will remember a specific brand name. If you're unsure which product you were exposed to, or don't recognize any of these names, that case can't currently be accepted.
Chlorpyrifos1965–present
Dursban1965–2001 · Residential
Lorsban1965–2020 · Agricultural
Cobalt2007–2023
Duraplex TR1966–2022 · aka Whitmire PT 1920
Durashield CS1995–2022 · aka Duration
Bolton2012–2022
Hatchet1993–2023
Insecta1981–present
Drexel Chlorpyrifos1999–present
Lambdafos2015–present
Lock-On1989–2023
Pilot1996–present
Pyrofos2009–2022
Stallion2011–2022
Tundra Supreme2010–2023
Vesper2013–2022
Voltage Endurx2012–present
Vulcan2011–present
Warhawk2004–present
Yuma 4E2006–2011
Govern2020–present
Andersons Gold Products Insecticide III1974–present
Chemsico Roach Control1988–present
MosquitoMist1987–present
Where the Litigation Stands
Chlorpyrifos: A Regulatory Fight Moving Into the Courtroom
Unlike many mass-tort drug cases, chlorpyrifos claims haven't yet been consolidated into a federal MDL. Instead, the pattern mirrors other toxic-exposure litigation in its early phase: scattered high-value individual cases, growing scientific consensus, and mounting pressure for broader coordination.
Complete
EPA Rulemaking
EPA issued a final rule revoking all food-use tolerances in 2021; the rule has since been challenged and partially rolled back.
Complete
Early Case Investigations
Advocacy groups and firms began building cases using long-term cohort studies tying exposure to measurable cognitive harm.
Active Now
State Court Filings
Suits filed in California and New York state courts; additional cases under investigation in other agricultural states.
Active Now
Early Discovery
Targeting internal manufacturer documents on neurotoxicity, EPA communications, marketing materials, and application or drift data.
Upcoming
Broader Coordination
No MDL exists yet, but growing case volume and shared causation evidence could drive formal consolidation.
- Epidemiologic evidence is driving causation arguments — plaintiffs are relying on the same long-term cohort studies that drove EPA's regulatory action
- Discovery is targeting internal documents on neurotoxicity, communications with EPA and state regulators, and marketing materials plaintiffs say downplayed risk to pregnant women and children
- Application-rate and drift data near homes and schools is being sought in early discovery
Eligibility
Who May Qualify for a Chlorpyrifos Claim
At this time, cases are being accepted only for farmworkers and applicators with chronic neurologic symptoms following repeated occupational exposure, or individuals with qualifying residential exposure, who were later diagnosed with Parkinson's disease or Parkinsonism. Only direct exposure is currently being accepted — indirect exposure cases don't qualify at this time.
Current Eligibility Criteria
- Occupational exposure (farmworkers, applicators) between 1965 and 2020
- Residential exposure prior to the year 2000 only
- Diagnosed with Parkinson's disease or Parkinsonism
- Direct exposure only — indirect exposure doesn't currently qualify
- Able to identify a specific qualifying product (see product list above)
Helpful Supporting Evidence
- Medical records showing diagnosis and symptom timing
- Residence and work history near chlorpyrifos use
- Spray records, application logs, or employer records
- Environmental testing (soil, dust, or water) where available
Looking ahead: future cases may include children with neurodevelopmental injuries (ADHD, autism spectrum features, IQ loss, motor deficits) allegedly linked to prenatal or early-life exposure. These claims aren't yet being accepted. If you're unsure which product was used, or don't recognize any of the qualifying products listed above, that case can't be accepted at this time.
Common Questions
What Clients Ask Us Most
I was exposed before 1965 or after 2020 — do I qualify?
Current occupational eligibility is limited to the 1965–2020 window and residential exposure before 2000. If your exposure falls outside those windows, reach out anyway — eligibility criteria can change as the litigation develops.
What does it cost to work with Cornerstone Law?
We handle chlorpyrifos cases on contingency — no upfront fee, and we only get paid if we recover compensation for you.
I don't remember the exact product name — what should I do?
Try checking old employer records, purchase receipts, or pest-control invoices. If you genuinely can't identify a qualifying product, we currently can't accept the case, but that may change as more products are added to the list.
Is there a class action or MDL for chlorpyrifos?
Not yet. Cases are currently being filed individually in state courts, primarily California and New York, though growing case volume could eventually drive formal federal consolidation.
Why Cornerstone Law: We track every development in chlorpyrifos litigation — from EPA rulemaking to state court filings to discovery — to build the strongest possible case for our clients.
Cornerstone Law Is Investigating Chlorpyrifos Cases Nationwide
We represent farmworkers, applicators, and residents who developed serious neurologic conditions after chlorpyrifos exposure. Find out whether you meet our current eligibility criteria.
Get a Free Case Review
No fee unless we recover compensation for you. Call 1-800-928-9445.
This page is for informational purposes only and does not constitute legal advice. Prior results do not guarantee a similar outcome in any future case. This is a paid legal advertisement from Cornerstone Law, LLP. Attorney Frank Zeccola, Esq., licensed to practice law in California, is responsible for this advertisement.
