What Are Mass Torts?
Key Takeaways
- A mass tort is a civil action involving many plaintiffs with similar claims against one or a few defendants
- Each plaintiff's case is treated individually, allowing personalized damages
- Common categories include pharmaceutical injuries, defective products, and environmental contamination
- Most federal mass torts are consolidated into Multidistrict Litigation (MDL)
What Is a Mass Tort?
A mass tort is a civil legal action in which numerous individual plaintiffs file claims against one or a small number of corporate defendants, alleging that the same product, drug, device, or conduct caused them injury. Unlike class actions — where all members are treated as one group — mass tort plaintiffs retain their individual cases, meaning each person's injuries, damages, and circumstances are evaluated separately.
Mass torts arise when a widely distributed product or systematic conduct causes harm to many people. Common examples include defective pharmaceutical drugs, dangerous medical devices, toxic chemical exposure, and consumer product defects.
How Are Mass Torts Different from Class Actions?
While both involve many plaintiffs, the critical difference is individuality. In a class action, one or a few plaintiffs represent the entire class, and all class members typically receive the same outcome. In a mass tort, each plaintiff files an individual case and can receive different compensation based on their specific injuries, circumstances, and damages.
What Are the Common Types of Mass Torts?
Pharmaceutical & Drug Litigation
When prescription or over-the-counter drugs cause unintended injuries — such as cancer, organ damage, or birth defects — mass tort lawsuits hold manufacturers accountable for failing to warn consumers or for marketing unsafe products. Notable examples include Roundup (cancer), Zantac (NDMA contamination), and talcum powder (ovarian cancer/mesothelioma).
Medical Device Litigation
Defective medical devices — including hernia mesh, IVC filters, hip and knee implants, and CPAP machines — can cause serious complications requiring additional surgeries, chronic pain, or life-threatening conditions.
Environmental & Toxic Exposure
When communities are exposed to toxic chemicals through contaminated water, air, or soil, mass tort litigation seeks accountability. Examples include Camp Lejeune water contamination, PFAS "forever chemicals," and the East Palestine train derailment.
Consumer Products & Institutional Abuse
Mass torts can also address widespread harm from consumer products (like social media platforms targeting children) or institutional failures (like the Boy Scouts of America sexual abuse scandal).
How Does the MDL Process Work?
Most mass torts in the federal court system are consolidated into Multidistrict Litigation (MDL). The Judicial Panel on Multidistrict Litigation (JPML) transfers cases with common factual questions to a single federal judge for coordinated pretrial proceedings, including discovery and motions.
This process improves efficiency and consistency while preserving each plaintiff's individual claim. After pretrial proceedings, cases may be remanded to their original courts for trial, settled individually, or resolved through a global settlement.
Why Do Mass Torts Matter?
Mass tort litigation serves a critical role in the American legal system by holding corporations accountable when their products or conduct cause widespread harm. By aggregating similar claims, mass torts give individual plaintiffs the collective resources and legal infrastructure needed to take on well-funded corporate defendants — while still preserving each person's unique story and right to individualized compensation.