Abstract
In this study, a conceptual model integrating the Information Adoption Model (IAM) with the Technology Acceptance Model (TAM) and the Theory of Planned Behaviour (TPB) was developed to investigate household sustainable water use. The study examined how argument quality and source credibility influence the perceived usefulness of information adoption on water conservation. Furthermore, understanding how perceived usefulness affects perceived behavioural control and information adoption of water conservation and the effect of perceived behavioural control of information adoption of water conservation to achieve sustainable household use. Data was collected from 408 usable data from South African households using a random sampling technique and an online self-administered survey. The data collected was analyzed using SmartPLS version 4 software. The findings confirmed the significant and positive relationship on four proposed relationships, except for source credibility's negative and insignificant effect on the perceived usefulness of water conservation information. One of the most impactful findings was the positive effect of perceived usefulness on perceived behavioural control, which had no support from the literature. This is an excellent contribution of the study to the existing literature. The study's implications, limitations and recommendations for future studies based on our findings are provided.