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Management of solid waste is not only a South African challenge but a global challenge. Separation of waste at source is a vital process in ensuring effective waste management at all levels. This article aims to investigate the effects of waste separation at source in the Thembisile Hani Local Municipality, in Kwaggafontein, Mpumalanga Province. This study was based on a pragmatic research paradigm, mixed-methods research design, qualitative and quantitative research approaches, and the Theory of Planned Behaviour. The population of this study was officials of the Thembisile Hani Local Municipality and community members. The sample of this study consisted of 240 participants who completed the questionnaires and five participants who were interviewed. Purposive sampling and simple random sampling methods were used to select the samples of the study. Individual interviews and questionnaires were used as instruments for collecting data.