This study aims to evaluate the effectiveness of urban drainage governance in Semarang City by examining the institutional performance of the Public Works Agency in implementing Minister of Public Works Regulation No. 12/PRT/M/2014, as well as identifying the key constraints affecting its implementation. Urban flooding and waterlogging remain persistent issues, indicating a gap between regulatory mandates and practical outcomes. Employing an empirical juridical approach with a descriptive design, this research integrates normative legal analysis with field data obtained through interviews, observations, and literature review, which are analyzed qualitatively. The results show that although drainage management programs have been formally implemented in accordance with regulatory provisions, their effectiveness remains partial, as evidenced by recurring flooding caused by limited infrastructure capacity, sedimentation, delayed budget allocation, and low levels of community participation. The novelty of this study lies in its integrative analytical framework that connects regulatory compliance with institutional performance, demonstrating that legal effectiveness in infrastructure governance is contingent upon implementation capacity rather than merely normative existence. These findings imply that strengthening urban drainage governance requires performance-based maintenance planning, improved procurement mechanisms, enhanced inter-agency coordination, and institutionalized community participation to ensure sustainable flood risk mitigation.
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