This study addresses the critical global challenge of waste management by examining the factors influencing public engagement in waste sorting. Employing the TPB (Theory of Planned Behavior), the research investigates how intention mediates the effects of perceived knowledge and recycling infrastructure on waste sorting practices. Through Pearson correlation analysis and hierarchical regression, the findings reveal significant relationships between subjective knowledge, facilities, intention, and waste sorting behavior. Notably, intention serves as a crucial mediator, highlighting the importance of motivation in translating knowledge and access to facilities into effective waste sorting actions. The results underscore the need for integrated strategies that combine education, infrastructure improvements, and motivational incentives to foster greater public engagement with waste sorting.