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Filling Discrepancies between Consumer Perception and Actual Piped Water Quality to Promote the Potable Use of the Municipal Water Supply in Indonesia
Summary
This paper is not about environmental microplastics in an ecological or health context; it studies consumer trust and drinking water preferences in Indonesian cities to encourage tap water use over bottled water, with the plastic waste angle being secondary and policy-focused rather than scientific.
Although piped water is a safely managed water source, many people prefer drinking packaged/bottled water, which undermines environmental sustainability by creating waste plastics. Thus, to encourage drinking tap water, this study aimed to identify and fill the discrepancy between consumers’ perception of and the actual quality of the municipal water supply in Indonesia. Through questionnaire surveys in three cities, i.e., Malang, Bogor, and Semarang cities, we found that the majority of the residents, namely, 82%, 58%, and 66%, respectively, drank packaged water. Although the piped water supply from Perusahaan Daerah Air Minum (PDAM) has a good appearance, color, taste, and water quality, sporadic microbial contamination was detected due to the depletion of residual chlorine. However, packaged water was also contaminated by indicator bacteria owing to storage methods. There was a notable discrepancy between the residents’ perceptions of tap water safety and their choices of drinking water sources. The residents perceived spring water as a clean source, which influenced their selection of water sources more than the costs of water. Public drinking stations installed by PDAM helped to win consumers’ trust in PDAM water, indicating that installing more public drinking stations will encourage more people to drink piped water.
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