Federal Court Blocks New Mexico PFAS Labeling Rule
A federal judge has issued a preliminary injunction against New Mexico’s far-reaching PFAS labeling requirements for consumer products, finding that the trade associations challenging the rules are likely to prevail on their First Amendment claim. The court’s order turns on its determination that the labeling mandate is not a “reasonable fit” for the state’s asserted interests.
Issued September 16, 2026, the injunction bars enforcement of the labeling mandate in its entirety while the litigation proceeds—less than four months before the requirements were set to take effect.
Regulatory and Legal Background
New Mexico promulgated the PFAS labeling mandate in May 2026. If allowed to take effect, the rules would require all consumer products manufactured for sale or distribution in the state that contain intentionally added PFAS to bear a PFAS label after January 1, 2027. The required label consists of the term “PFAS” within an Erlenmeyer flask pictogram. Only used products and certain products subject to federal regulation, like pesticides and drugs, are exempt.
In July, the plaintiffs—which include the American Chemistry Council, Alliance for Automotive Innovation, American Coatings Association, National Association of Manufacturers, and several other industry groups—filed suit in the District of New Mexico. Their arguments revolve around which type of First Amendment scrutiny should apply to the labeling mandate.
While government-compelled speech is generally subject to heightened scrutiny, a lesser form of scrutiny applies to certain types of compelled commercial disclosures under Zauderer v. Office of Disciplinary Counsel. As discussed in a previous post, the plaintiffs argue that Zauderer does not apply and that the labeling mandate should therefore be subject to heightened scrutiny.
The Preliminary Injunction
Analyzing the label under Zauderer, the court first found that the required disclosure was likely to be purely factual and uncontroversial. However, the court then preliminarily determined that there was no reasonable connection between the labeling requirement and New Mexico’s asserted interests, making Zauderer inapplicable.
New Mexico asserted interests in protecting consumer health and safety, protecting the environment, and providing relevant information about the manufacturing process to consumers. In response to the plaintiffs’ argument that the label is not purely factual because it misleadingly communicates hazard, New Mexico stressed that the label is not a warning. Instead, the state argued, the label merely promotes consumer awareness of PFAS.
This proved to be the state’s undoing. “In characterizing the required label as a ‘consumer awareness label,’ and not a ‘warning label,’ Defendants destroy the connection between the purpose of the required disclosure – to promote consumer and environmental health – and the means employed to realize that purpose, which in other instances is achieved with a warning,” the order states.
“A label that conveys no information cannot, be ‘inextricably intertwined’ with the goal of reducing the health and environmental impact of PFAS for the label does not provide any advice or information about PFAS,” the order continues.
In the court’s view, New Mexico’s characterization of the label makes its goal more akin to addressing “consumer curiosity.” The court noted that other courts have found consumer curiosity to be an insufficient basis for compelled labeling.
The court also observed that New Mexico appears to want the label to operate as a warning, pointing to statements in the state’s expert declarations and on its website characterizing the label as a warning. “However, the Regulation cannot simultaneously, as Schrödinger would have it, be merely a consumer awareness label and not a warning label, and if it is a consumer awareness label it serves to promote consumer curiosity about the contents of various products,” the order states.
Because the court found no reasonable fit between the disclosure requirement and the state’s asserted interests, it concluded that the mandate could not survive heightened scrutiny either.
The case is Am. Chemistry Council v. Kenney, No. 1:26-cv-2130 (D.N.M.), filed July 1, 2026.
