Environmental management is a critical issue for the readymade garment (RMG) industry, as it is a significant contributor to environmental degradation and pollution. Effective environmental management planning (EMP) is crucial for RMG factories to reduce their environmental impact and promote sustainability. This research focuses on the development of a sustainable EMP as a case study for an RMG factory, intending to address the environmental challenges facing the industry. The factory was segmented into 24 different sections, and activities for each section were enlisted to determine their environmental impact. Using a risk matrix analysis, the study identified noise pollution from various sources, such as from winding, auto placket, back winding, electricity generator, and compressor section, as well as water pollution from the washing section and stack air emission from the generator and boiler section, as the biggest environmental risks. The findings of this study provide valuable insights into the environmental impact of the RMG industry, highlighting the challenges it faces in terms of sustainability. The study underscores the need for effective management strategies to address these challenges and promote sustainability.