In 1994, South Africa adopted intergovernmental relations (IGR) to facilitate service delivery. Sections 40-41 of the Constitution of the Republic of South Africa, 1996, link service delivery with normative aspects of IGR, which include cooperation, transparency, accountability, mutual support, and coherence. A coherent implementation of IGR was subsequently emphasised by the Intergovernmental Relations Framework Act 13 of 2005. However, South Africa continues to experience service delivery challenges, especially in marginalised and poor communities in the current and former informal settlements. The selected Diepsloot was established as an informal settlement in 1995 and has been under an in situ upgrade programme. The study’s focus was on the provision of potable water in the City of Johannesburg with specific reference to Diepsloot. A case study approach was used to assess lived experiences among the actors within the intergovernmental context of cooperative government. A qualitative methodology was utilised to source data about intergovernmental interactions among actors from the public institutions by means of semi-structured interviews and documentary analysis. Lastly, a focus group was utilised for members of the ward committees in Diepsloot. The study concluded that IGR system is not used adequately to support Diepsloot to access potable water in accordance with an established standard. In essence, the IGR system lacks an integrated approach to reverse a legacy of informality. To facilitate an IGR improvement, the study’s recommendations were three-fold: (i) provision of integrated support to the City of Johannesburg for Diepsloot despite erroneous assumption that metropolitan municipalities are self-sufficient, (ii) standardisation of potable water provision in Diepsloot by means of integrating IGR institutional responses, and (iii) institutionalisation of IGR engagements with other cities. To this end, the study proposed a model of integrated intergovernmental support to improve potable water provision and, by extension, other related services in Diepsloot. / Public Administration / D.P.L. (Public Administration)