Urban catchments are increasingly facing water-related challenges driven by rapid development and climate change. Conventional stormwater management is often inadequate, particularly in removing gross pollutants and sediments. This study explores an integrated approach combining continuous deflective separation (CDS) technology with nature-based solutions (NbS), including biochar, green zeolite, and floating wetlands planted with Vetiver grass, implemented at a commercial urban site in Malaysia. An on-site Internet of Things (IoT)-based monitoring system tracks water quality parameters: pH, turbidity, electrical conductivity (EC), dissolved oxygen (DO), total dissolved solids (TDS), and temperature (T).