With reference to his reply to question 2100 on 28 June 2023, which outlines the existing regulatory frameworks and enforcement measures, (a) what are the reasons that the measures have proven ineffective in holding municipalities accountable for their negligence, (b) what specific steps of intervention will he take to address the systemic failures that allow municipalities to disregard their obligations and (c) how will he ensure that the measures result in tangible improvements and the prevention of further contamination?