The debate over PFAS reaches a new political and legal dimension in France. On May 20, 2026, the environmental organizations Générations Futures, Notre Affaire à Tous, and Bloom, together with six residents of affected regions, filed a lawsuit before the administrative court in Paris. Their accusation: The French state has failed for years to adequately address the dangers of the so-called “forever chemicals,” thereby violating its duty to protect the population and the environment.
PFAS, the abbreviation for per- and polyfluorinated alkyl substances, encompass several thousand artificially manufactured chemicals. Due to their water-, grease-, and dirt-repellent properties, they have been used for decades in numerous industrial and consumer products—from outdoor clothing to cosmetics to food packaging. The problem is that many of these substances practically do not degrade in the environment. They enter soils, rivers, and groundwater and can accumulate in the human body.
The plaintiffs argue that the risks of PFAS have long been known. Scientific studies link certain compounds to elevated cholesterol levels, immune system disorders, fertility problems, and some cancers. Nevertheless, the state reacted too late and hesitantly. The organizations therefore demand not only an end to emissions but also comprehensive assumption of health and remediation costs by the polluters.
In fact, the French government has taken several measures in recent years. Following an initial action plan in 2023, an interdepartmental program for monitoring and reducing exposure was introduced in 2024. With the law of February 2025, certain PFAS-containing products were finally banned. Since early 2026, numerous cosmetics, ski waxes, as well as certain textiles and shoes, among others, may no longer be placed on the market. Additionally, the control of drinking water has been significantly expanded.
However, the plaintiffs feel these steps do not go far enough. They criticize numerous exceptions and transitional periods, as well as the continuing contamination of many regions. Especially in industrialized areas, elevated PFAS levels have repeatedly been detected in recent years, which has increased the concerns of the affected population.
The trial politically recalls the famous climate lawsuit “Affaire du siècle,” with which the French state was already condemned for insufficient climate policy. This time, too, it is a question of state responsibility in the face of known environmental hazards. Should the court determine a “carence fautive”—a culpable failure of state action—this could have far-reaching consequences for environmental policy, industry, and public finances.
At its core lies a fundamental question of modern environmental policy: Who bears the costs of decades of pollution when the risks were known but effective countermeasures were only taken late? The court’s answer could extend far beyond the PFAS issue and set new standards for how the state deals with long-term environmental and health risks.