Summarized by Javier Garcia, Roy Little Fellow.
Clean-ups don't work: Cigarette Butt Reaccumulation requires proactive prevention
In a recent study, researchers from San Diego State University studied the accumulation of and efficacy of clean-ups of cigarette butts in the Kendall-Frost Mission Bay Marsh Reserve. Cigarette butts are the most common form of litter that flows into storm drains, contributing to urban runoff. Cigarette butts are both a major source of plastic pollution due to their cellulose acetate filter and a source of toxic chemicals that make their way into aquatic environments. The goal of this study was to understand how cigarette butts accumulate near stormwater inlets that eventually flow into the marsh, and whether cleanups help reduce reaccumulation.
To investigate this, researchers conducted multiple field surveys near 29 stormwater inlets and measured the buildup and the rates of reaccumulation of cigarette butts after removal efforts. Results showed that cigarette butts rapidly return to pre-clean-up levels in very short amounts of time. Within just seven weeks of clean-up efforts, cigarette butts reaccumulate at levels of 90% of pre-clean-up efforts. This means that while clean-ups offer short-term relief, they don't address the root cause of the problem, being the input of litter from human behavior, making clean-up efforts futile in the long run. Overall, these findings suggest that cigarette butt pollution in urban environments remains a persistent issue, highlighting the need for long-term strategies such as waste management, policy interventions, and behavioral changes to mitigate its impact on aquatic systems.
Read the full paper here:
Matt, Georg E., Lydia Greiner, Michael Vingiello, Gunnar Wooldridge, Kris Tran, and Thomas E. Novotny. "Why Cleanups Do Not Work: Accumulation and Reaccumulation of Cigarette Butts on Runoff-Contributing Surfaces near Storm Water Inlets." ACS ES&T Water (2026).
