Ozonation has emerged as a promising technology for wastewater treatment due to its potent oxidizing properties, which enable the degradation of recalcitrant organic pollutants and improvement of effluent quality. This study explores the estimation methodology for optimum ozone dosage & residual ozone for effective wastewater treatment, investigate its efficiency in reducing organic pollutants and improving treated effluent quality. The primary focus was on the effects of ozonation on Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), color, and residual ozone concentrations. Ozone was generated using an ozone generator (5% concentration) and applied to wastewater samples for various contact times. The results revealed significant reductions in COD (up to 42.9%) and BOD (up to 44%), indicating ozone's strong oxidative capability. Ozonation also led to an impressive 98% color removal. The study demonstrated that ozonation is highly effective in achieving a superior level of disinfection, proving to be a sustainable technology capable of meeting stringent treated water quality standards. Further optimization of operational parameters can enhance the efficiency and cost-effectiveness of ozonation for large-scale wastewater treatment applications.