Current water treatment technologies struggle to remove efficiently metaldehyde, an 8-member cyclic tetramer of acetaldehyde commonly used as a molluscicide in agriculture and gardening. Due to its frequent use and high solubility in water, metaldehyde often exceeds regulatory limits. Researchers have evaluated the effectiveness of activated carbon and polymeric ion exchange sorbents in the elimination of metaldehyde. The Langmuir and Freundlich models accurately predicted the sorption isotherms and thermodynamic studies revealed that the sorption process is endothermic and driven by entropic changes rather than enthalpic ones. Kinetic data fitted an intra-particle diffusion model, indicating that the sorbent’s porosity significantly affects the sorption rate. These findings suggest a promising, cost-effective system for removing metaldehyde from drinking water, offering significant practical benefits.