The construction of toll road infrastructure is crucial for driving economic growth and enhancing regional connectivity. One of the largest ongoing projects in Indonesia is the Trans Sumatera Toll Road mega project, developed by PT Hutama Karya (Persero). Despite its promising prospects, the project faces significant challenges, including providing clean water for operational use. Effective water management is essential, impacting project operational costs, worker and toll road user health, rest area functionality, and environmental sustainability.

This study presents an overview of water use in construction and recommends measures to enhance water management practices. It analyzes various solutions for clean water management, ranking them based on efficiency, sustainability, and practicality. Using a multi-criteria decision analysis (MCDA) approach, the research evaluates the potential benefits of each solution, with Hutama Karya’s wastewater treatment technology being a key focus.

The results indicate that the proposed solution ensures optimal water availability and quality, particularly in toll road projects and rest areas. Furthermore, this research offers advantages in sustainability and eco-friendly energy use. This technology proves effective, economically viable, and beneficial for sustainable water management. This paper aims to identify and rank the best solutions for clean water management to support the Trans Sumatera Toll Road mega project.