TSM system in Jordan is a comprehensive quality management system that improves the management and operation of WWTPs. TSM aligns the vision of the Jordanian water and sanitation sector with SDG6 which aims to ensure the availability and sustainable management of water and sanitation for all. Managed by the Water Authority of Jordan (WAJ), TSM consists of six key pillars: Human Resources, OSH, O&M, Quality Assurance and Control, and Energy Efficiency. TSM ensures compliance with national and international standards, improves operational performance, and contributes to environmental sustainability. This paper evaluates the impact of TSM in Jordan, highlighting its contribution to SDG6 targets related to wastewater treatment, treated wastewater quality improvement, and the efficient use of resources within the sector. By incorporating strategic asset management principles, the TSM has strengthened the long-term sustainability and resilience of Jordan’s WWTPs. TSM system approach to inspection, certification, monitoring, and benchmarking has led to notable improvements in plant effectiveness, efficiency, and compliance. The findings are discussed within a broader international context of global water management strategies. This paper shares lessons learned and highlights for addressing water challenges in arid regions. The paper also highlights how TSM can serve as a model for advancing SDG6.