Chlorpyrifos Litigation:
Regulatory Controversy Moves Into the Courtroom
After years of scientific debate over neurodevelopmental harm, chlorpyrifos exposure claims are now active in state courts. Farmworkers, applicators, and residents with a documented Parkinson’s or Parkinsonism diagnosis may qualify. No coordinated MDL exists yet — but early, high-value individual cases are already being filed and investigated nationwide.
Qualifying Products
Which Chlorpyrifos Products May Be Involved?
There is 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 cannot currently be accepted.
Where the Litigation Stands
Chlorpyrifos: Litigation Status
Unlike many mass-tort drug cases, chlorpyrifos claims have not 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.
EPA Rulemaking
EPA issued a final rule revoking all food-use tolerances in 2021; the rule has since been challenged and partially rolled back.
Early Case Investigations
Advocacy groups and firms began building cases using long-term cohort studies tying exposure to measurable cognitive harm.
State Court Filings
Suits filed in California and New York state courts; additional cases under investigation in other agricultural states.
Early Discovery
Targeting internal manufacturer documents on neurotoxicity, EPA communications, marketing materials, and application/drift data.
Broader Coordination
No MDL exists yet, but growing case volume and shared causation evidence could drive formal consolidation.
Latest Developments · 2024–2026
What Is Happening in Chlorpyrifos Litigation Right Now
Chlorpyrifos has shifted from a regulatory controversy into active civil litigation. Several suits have been filed in state courts in California and New York, with more under investigation in other agricultural states.
- Regulatory landscape remains fluid — the EPA’s 2021 tolerance-revocation rule has been challenged and partially rolled back
- State court suits filed — in California and New York, with additional cases under investigation in other agricultural states
- Epidemiologic evidence driving causation arguments — plaintiffs are relying on the same long-term cohort studies that drove regulatory action
- Discovery targeting internal documents — on neurotoxicity and developmental risk, communications with EPA and state regulators, and marketing materials downplaying risk to pregnant women and children
- Application-rate and drift data — near homes and schools is being sought in early discovery
- No coordinated MDL yet — but the pattern mirrors other toxic-exposure litigation in its early phase, with pressure building for broader coordination
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 do not 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 does not 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
Our Firm Is Now Investigating Chlorpyrifos Cases
We represent farmworkers, applicators, and residents nationwide who developed serious neurologic conditions after chlorpyrifos exposure. We track every development — from EPA rulemaking to state court filings to discovery — to build the strongest possible case for our clients.
We handle these cases on a contingency fee basis — you pay nothing unless we win.