By Timothy S. Donahue

Top Takeaways:

• Environmental lawsuit: Denver is seeking to make major cigarette manufacturers pay for the city’s costs of removing discarded cigarette filters, arguing they create a continuing public nuisance.
• Plastic pollution focus: The lawsuit centers on cellulose acetate cigarette filters, alleging they persist in the environment as plastic waste and microplastics rather than biodegrading.
• Expanding litigation: The case represents a new legal front for the tobacco industry, shifting from smoking-related health claims to environmental cleanup and product stewardship.

Denver says taxpayers shouldn’t be paying to clean up cigarette butts. The City and County of Denver, Colorado, has sued many of the nation’s largest cigarette manufacturers, seeking to recover the costs of cleaning up discarded cigarette filters, which the city alleges have become a major source of plastic pollution across its streets, stormwater system and waterways.

The 72-page complaint, filed on Aug. 7 in Colorado’s Second Judicial District Court, names Philip Morris USA Inc., Altria Group Inc., R.J. Reynolds Tobacco Co., Reynolds American Inc., British American Tobacco p.l.c., Santa Fe Natural Tobacco Co., ITG Brands LLC, Liggett Group LLC, Liggett Vector Brands LLC, and Peerless Products Inc. as defendants. The case has been assigned to District Judge A. Bruce Jones.

Unlike traditional tobacco litigation focused on smoking-related disease, Denver’s lawsuit targets the environmental consequences of cigarette filters, arguing that manufacturers knowingly shifted cleanup costs from the industry to municipalities and taxpayers.

“Each sale and distribution of filtered cigarette products within Denver foreseeably results in additional cigarette filter waste being deposited on municipal property, and each day that such persistent plastic waste remains on plaintiff’s property constitutes a continuing interference with plaintiff’s property rights and public resources,” the city states in its complaint.

The lawsuit argues modern cigarette filters are made from cellulose acetate, which it describes as “a synthetic plastic polymer that does not biodegrade under ordinary environmental conditions.”

Rather than breaking down naturally, the complaint alleges that the filters fragment into smaller and smaller plastic particles while remaining in the environment.

“Instead of decomposing, the cellulose acetate filters fragment into progressively smaller plastic particles, including microplastics, the underlying plastic material persists in the environment and continues to require municipal collection, removal, management, and disposal,” Denver alleges.

According to the complaint, discarded cigarette filters are not an unintended consequence of smoking but “an inherent, foreseeable, and unavoidable result of the product’s intended design and ordinary use.”

To support that claim, Denver cites internal industry materials and historical research, including a 1979 report on avoiding liability under litter laws and a 1996 survey that found 96% of smokers discarded cigarette butts on the ground. The city argues that those documents show manufacturers have long understood how consumers dispose of filtered cigarettes.

Rather than seeking reimbursement for smoking-related healthcare costs, Denver is pursuing damages tied to municipal cleanup operations.

The complaint asserts claims for public nuisance, trespass, negligence, product liability, and violations of Colorado consumer protection law, asking the court to require the manufacturers to reimburse the city for costs associated with removing cigarette litter from public spaces, storm drains, and waterways.

Chris Schnieders of McIntyre Schnieders, representing Denver, said the case is ultimately about assigning responsibility for those costs.

“Denver filed this lawsuit because the city alleges that cigarette filters have become a major source of plastic pollution in its stormwater system and waterways, and that the costs of addressing that pollution have been shifted onto the public,” Schnieders said. “At its core, this case is about who should pay those costs. The city alleges that Denver taxpayers should not be left paying to address pollution that the manufacturers allegedly knew was a foreseeable result of the way these products were designed and sold.”

The lawsuit arrives as governments worldwide intensify scrutiny of single-use plastics and products that generate persistent environmental waste. Cigarette filters—introduced decades ago as a product innovation and now used on the vast majority of commercially sold cigarettes—have increasingly become the focus of environmental campaigns because cellulose acetate can persist in the environment for years before breaking down into smaller plastic fragments.

While Denver’s lawsuit is a major escalation, the City of Baltimore filed the first-of-its-kind environmental lawsuit against major tobacco companies for cigarette filter waste on November 21, 2022. That case is still pending.

In July, Sacramento County and the City of Fresno also filed lawsuits seeking to hold major tobacco companies financially responsible for cleanup costs related to discarded cigarette filters.

The litigation also reflects a broader evolution in tobacco-related lawsuits. For decades, legal challenges largely focused on smoking-related health effects, marketing practices, and youth access. Denver instead seeks to establish that manufacturers should bear responsibility for the downstream environmental costs of their products, similar to litigation brought against other industries over packaging waste and pollution.