<![CDATA[The availability of clean water is an important factor in supporting the operational activities and business sustainability of Micro, Small, and Medium Enterprises (MSMEs), particularly businesses that depend on water for their production processes. This study aims to analyze MSME owners' perceptions of the service quality and fairness of water tariffs provided by PDAM Tirtanadi, examine their implications for business operations and sustainability, and evaluate the findings from an Islamic economic perspective. This research employs a qualitative method with a case study approach involving MSMEs located on Tuasan Street, Medan City. Data were collected through in-depth interviews with 10 informants, direct observation, and documentation. The data were analyzed descriptively through data reduction, data presentation, and conclusion drawing. The findings indicate that PDAM Tirtanadi generally helps meet business water needs, with relatively good water quality. However, inconsistent water distribution, delays in handling service disruptions, and limited information transparency remain significant obstacles. Water tariffs are generally considered reasonable, although some business owners believe that the costs are not fully proportional to the services received during distribution disruptions. These conditions can disrupt business operations, reduce productivity, and increase operating costs. From an Islamic economic perspective, PDAM services have provided public benefits (maslahah), but the implementation of justice (al-'adl) and trustworthiness (amanah) needs improvement, particularly in maintaining service quality, distribution continuity, and information transparency.]]>
