This thesis investigates related organizations perceptions and coordination in response to legal changes governing packaging waste collection (PWC) in Gotland, Sweden, utilizing Sensemaking theory, Interorganizational Coordination (IOC) theory, and Corporate Social Responsibility (CSR) theory. Through qualitative research methods, including interviews with key participants from public and private sectors involved in waste management, this study explores how individuals from different organizations make sense of and adapt to the new regulatory framework. The research identifies diverse organization views towards the legal changes, highlighting challenges related to ambiguity and clarity in regulatory details. Sensemaking processes influence organizational interpretations of the regulations, shaping their actions and collaborative efforts. IOC dynamics play a crucial role in waste management coordination, with task breakdown and coordination among multiple organizations proving more effective than centralized approaches. CSR illustrates the dilemma of private sectors’ contribution to broader sustainability goals due to competition concern in a market-driven business context. The study underscores the significance of public sector entities in waste management governance compared to private organizations. This research contributes to advancing understanding of waste management policy implementation and coordination dynamics within a regional context, leveraging sensemaking, IOC and CSR theories.