Microplastics (MPs) have emerged as pervasive and potentially hazardous contaminants in drinking water systems. Building on recent investigations at the Potsdam Drinking Water Treatment Plant that revealed the persistence of MPs throughout conventional treatment processes and potential recontamination within the distribution network, this project seeks to enhance our understanding of MP removal and mitigation. Specifically, we aim to (1) examine the physical removal mechanisms in sedimentation tanks, (2) assess MP recontamination risks across drinking water distribution systems, and (3) evaluate the role of biofilm formation on MPs in resisting disinfection and promoting disinfection by-products. The proposed research combines field sampling, laboratory analysis, hydrodynamic modeling, and chemical assessments to uncover critical processes influencing MP behavior and transformation. This interdisciplinary effort, supported by partnerships with municipal water authorities, will generate actionable insights to improve treatment efficacy, guide infrastructure upgrades, and reduce public exposure to MPs.
