The city of Cape Town suffered a severe water crisis in 2018. At the peak of the drought in South Africa's Western Cape, a randomized control trial at 105 schools investigated the impact of two behavioral interventions to encourage responsible water usage: detailed water usage data feedback from smart meters, and an interschool competition. Interventions reduced water usage in these schools by 15–26%. There was no significant difference between the information feedback and the combination of information feedback and competition. This example from Cape Town demonstrates the effectiveness of combining smart technologies with nudges. It provides a model of water conservation interventions for sustainable cities.

开普敦市在2018年遭受了严重的水危机。在南非西开普省干旱的高峰期，在105所学校进行了一项随机对照试验，调查了两种行为干预对鼓励负责任用水的影响：详细的用水数据反馈来自智能电表和一次校际比赛。干预措施使这些学校的用水量减少了15–26％。信息反馈与信息反馈与竞争相结合之间没有显着差异。开普敦的这个例子证明了将智能技术与微调相结合的有效性。它为可持续城市提供了节水干预的模型。