Paraquat Parkinson's Lawsuit in Missouri

What Missouri residents should know

Missouri residents are not necessarily limited to filing only in Missouri state court. Many mass tort claims may be evaluated by national firms, filed in federal court, coordinated through MDL proceedings, or handled through another legal process.

State law may still matter for deadlines, damages, claim evaluation, and certain procedural issues.

What stands out about Paraquat litigation in Missouri?

Missouri is geographically and structurally close to the federal paraquat MDL: MDL-3004 sits in East St. Louis, Illinois — immediately across the Mississippi from St. Louis — making the MDL a practical venue for Missouri claimants. Missouri's federal paraquat cases (filed in the Eastern or Western District of Missouri) are transferred by the JPML into MDL-3004 before Chief Judge Nancy J. Rosenstengel.

Missouri is also a documented paraquat-use state. Per the USDA NASS 2018 Soybean Chemical Use Survey, Missouri ranked among the top soybean states with about 5.9 million planted acres. Missouri is also included in NASS cotton chemical-use surveys (about 315,000 cotton acres in 2021). Paraquat is used in both crops as a burndown and pre-harvest desiccant.

Missouri pesticide regulation is governed by the Missouri Pesticide Use Act (Ch. 281 RSMo). As of mid-2026, a review of Missouri Attorney General announcements did not surface a state-level paraquat action against Syngenta or Chevron; this is an absence-of-evidence statement rather than a guarantee. Missouri's personal-injury statute of limitations is unusually long — generally five years (Mo. Rev. Stat. § 516.120).

Sources: USDA NASS 2018 Soybean Chemical Use Highlights (Missouri ~5.9M acres); USDA NASS 2021 Cotton Chemical Use Highlights (Missouri ~315,000 acres); Missouri Attorney General — news releases; JPML — pending MDL dockets.

Possible eligibility factors

Missouri residents may want to speak with a lawyer if they used or were exposed to Paraquat herbicide products and later experienced Parkinson's disease.

• Use, prescription, employment, service, or exposure history.
• Medical diagnosis and treatment records.
• Approximate dates of use, exposure, diagnosis, and treatment.
• Information about prior conditions, alternative exposures, or other facts a lawyer may need to evaluate.

What records support Paraquat claims in Missouri?

• Farm, applicator, co-op, employer, crop, purchase, spray-log, or pesticide-license records showing paraquat exposure.
• Records showing mixing, loading, spraying, equipment cleaning, drift exposure, or work near treated fields.
• Neurology records, movement-disorder specialist notes, medication history, and Parkinson's diagnosis records.
• Co-worker names, witness statements, photos, calendars, safety training, and documents tying exposure to a product and season.

What exposure and legal context matter in Missouri?

State residents may have encountered paraquat through farms, crop handling, pesticide application, agricultural work, mixing, loading, or nearby work activities.

Where are Missouri Paraquat cases handled?

Living in Missouri does not necessarily mean the case will be filed only in Missouri. Claims may be evaluated by national firms, filed in federal court, coordinated through MDL proceedings, or handled through another legal process.

Federal courts in Missouri

• Eastern District of Missouri
• Western District of Missouri

What is the filing deadline for Paraquat lawsuits in Missouri?

For a Missouri resident researching Paraquat claims, the starting point is usually Missouri's general personal injury period: 5 years under Mo. Rev. Stat. § 516.120(4). That is only a starting point, not a final legal deadline for every person.

The real filing deadline can depend on diagnosis date, when the injury and possible cause were discovered, exposure location, wrongful-death issues, prior claim paperwork, and whether the case is filed directly, transferred to an MDL, or handled through another process.

Discovery-rule note: Missouri's period generally runs from when damage is sustained and capable of ascertainment, which can function like a discovery rule in latent-injury cases.

How long do Missouri residents have to file?

Missouri's personal injury statute of limitations applicable to product liability claims is 5 years (Mo. Rev. Stat. § 516.120(4)). Accrual timing, tolling, and repose periods can still change the real deadline in an individual case.

• Filing period: 5 years — Mo. Rev. Stat. § 516.120(4).
• Discovery rule: Missouri's period generally runs from when damage is sustained and capable of ascertainment, which can function like a discovery rule in latent-injury cases.

Because the controlling deadline depends on diagnosis date, discovery facts, exposure history, wrongful-death rules, and how the claim is filed, only a licensed attorney can confirm the deadline that applies to a specific situation. This page is general legal information, not legal advice.

What should Missouri residents ask a lawyer?

• What proof do you need to connect my farm, applicator, or bystander exposure specifically to paraquat?
• How do Parkinson's diagnosis date, symptom history, and neurology records affect review?
• Does the confidential settlement program affect whether my claim can be evaluated?
• How do state filing deadlines affect my exposure and diagnosis timeline?
• Would my claim be handled locally, nationally, or through the MDL?
• Are there upfront costs?