The Mountain Valley Spring Water class action lawsuit is a federal case filed in August 2025 that accuses Primo Water and its subsidiaries of falsely marketing Mountain Valley as “purely sourced” and “free of pollutants” when independent lab testing allegedly detected arsenic, uranium, cadmium, and a chlorine-treatment byproduct in the bottles. The case, Nadel v. Primo Water Corporation, et al., is pending in the U.S. District Court for the Southern District of Florida. No class has been certified, no settlement exists, and there is nothing for buyers to file at this stage.1ClassAction.org. Class Action Lawsuit Claims Mountain Valley Spring Water Contaminated With Carcinogens
What the Lawsuit Alleges
Plaintiff Jeffrey Nadel, a Palm Beach County resident, sued Primo Water Corporation, Primo Water North America, Inc., and Mountain Valley Spring Company, LLC. The complaint quotes Mountain Valley’s own marketing, which describes the water as “the very best bottled water you can drink,” “purely sourced,” “exceptionally healthful,” “free of pollutants,” and containing “no additives whatsoever.” The brand credits a 3,500-year natural filtration through quartz and marble in Arkansas’s Ouachita Mountains and sells the product as “water as nature intended.” Buyers pay four to eight times the cost of standard bottled water for that promise.2ClassAction.org. Nadel v. Primo Water Corporation et al., Complaint3Top Class Actions. Class Action Lawsuit Claims Mountain Valley Spring Water Contains Carcinogens
According to the complaint, independent laboratory testing in July 2025 detected the following in Mountain Valley Spring Water:
- Arsenic at 0.16 μg/L
- Uranium at 0.21 μg/L
- Bromoform (a trihalomethane) at 0.15 μg/L
- Cadmium at 0.08 μg/L, which the complaint notes exceeds California’s Public Health Goal of 0.04 μg/L
The EPA has set a Maximum Contaminant Level Goal of zero for each of these substances, meaning the agency considers no amount safe for consumption. The bromoform finding is central to the theory of the case. Bromoform is a byproduct of chlorine-based water treatment, and the industry generally describes Mountain Valley’s bottling process as using ozone gas rather than chlorine. The complaint argues that the bromoform detection contradicts the company’s claims that the water is untreated and suggests undisclosed chlorine treatment.4ClassAction.org. Nadel v. Primo Water Corporation et al., Complaint
The lawsuit also alleges the company failed to update its water quality disclosures after its 2023 report and may have suppressed later lab results. Mountain Valley’s 2023 Water Quality Report listed arsenic, cadmium, and all PFAS compounds as “not detected” and stated no contaminants were found above FDA limits.5Mountain Valley Spring Water. 2023 Water Quality Report Primo Water reportedly disputes the claim but has not issued a public statement, maintaining that its products comply with FDA limits.6Outpost Natural Foods. Mountain Valley Spring Water
Why the Case Targets Marketing, Not Safety Limits
The complaint does not allege that Mountain Valley violates federal safety rules. It concedes that the detected levels fall below the FDA’s enforceable Maximum Contaminant Levels for bottled water. The legal theory is false advertising and deceptive business practices.4ClassAction.org. Nadel v. Primo Water Corporation et al., Complaint
The distinction matters. EPA Maximum Contaminant Level Goals are non-enforceable health targets set at zero for known or suspected carcinogens, reflecting the view that no exposure is risk-free. Enforceable limits are higher because they account for what is technically and economically achievable. For arsenic, the enforceable limit is 0.010 mg/L, far above the 0.00016 mg/L the complaint alleges was found.7U.S. Environmental Protection Agency. National Primary Drinking Water Regulations The plaintiff’s position is that when a company charges a luxury price and calls its product “free of pollutants” with “no additives whatsoever,” it should be held to the standard set by its own marketing, not just the regulatory floor. The complaint seeks class certification, damages tied to the price premium consumers paid, attorneys’ fees, and a jury trial.3Top Class Actions. Class Action Lawsuit Claims Mountain Valley Spring Water Contains Carcinogens
Who Would Be Covered
The proposed class covers anyone in the United States who bought Mountain Valley Spring Water in glass bottles from a retail store for personal, household, or family use between June 7, 2023, and whatever date a court might certify the class. The complaint identifies three products specifically: 1-liter glass bottles, 16.9 fl oz glass bottles, and 25.36 fl oz aluminum bottles.1ClassAction.org. Class Action Lawsuit Claims Mountain Valley Spring Water Contaminated With Carcinogens2ClassAction.org. Nadel v. Primo Water Corporation et al., Complaint
The class definition is proposed, not approved. Whether a court accepts it, narrows it, or rejects it is one of the first major questions the case has to answer.
What Buyers Should Do Now
Nothing, yet. The case is at an early stage. A court has not certified a class, no claims administrator has been appointed, and there are no filing deadlines to meet. There is no settlement fund to claim from. If the case is certified as a class action and reaches a settlement or judgment, affected buyers would typically receive a notice describing how to submit a claim, object, or opt out.
Keeping proof of purchase, such as receipts or store loyalty records for the glass or aluminum bottles listed above, is the practical step available now. Whether that documentation ends up mattering depends on how the case develops.
Where the Case Stands
The lawsuit was filed on August 11, 2025, in the Southern District of Florida. Plaintiff’s counsel is Travis Robert-Ritter of Albrecht Ritter, PLLC.8Mountain Valley Water Class Action. Nadel v. Primo Water Corporation, et al.
The defendants named in the complaint reflect the corporate structure that existed before a major merger. Mountain Valley has been owned since 2018, when DS Services, then a subsidiary of Cott Corporation, bought the brand for roughly $78.5 million.9Encyclopedia of Arkansas. Mountain Valley Spring Water Cott later rebranded as Primo Water Corporation. In November 2024, Primo Water completed an all-stock merger with BlueTriton Brands, owner of Poland Spring and Deer Park, forming Primo Brands Corporation, which now trades on the NYSE under PRMB.10PR Newswire. Primo Brands Corporation Announces Successful Completion of Merger The lawsuit was filed about nine months after the merger closed and names the pre-merger entities. How the new corporate structure affects the litigation has not been addressed in any public filing available so far.