A waste stabilization pond system (WSPs) is one of the most promising wastewater treatment methods in the world. Bahir Dar university Peda campus constructed waste stabilization ponds and the effluent is discharged into the environment without evaluating its performance and determining its quality. The present study aimed to evaluate the WSP removal efficiency in terms of TC, FC, nitrate, and phosphate, and assess water quality parameters like temperature, pH, dissolved oxygen, conductivity, turbidity, and chlorophyll-a. A laboratory-based seasonal study was conducted in dry, wet, and semi-wet seasons from April 2022 to January 2023. The water sample was taken three times per each season. A total of 45 samples were analyzed from five sampling sites in the three seasons. A standard APHA method of procedure was used to collect and analyze bacteriological and physicochemical parameters of the sample. MINITAB version-18 was used for statistical analysis. Multiple tube fermentation technique use used for coliform enumeration. The removal efficiency of total coliform was 93.7%, 91.9 %, and 76.9% in dry, wet, and semi-wet seasons respectively. Whereas removal efficiency of fecal coliforms was 99.2%, 73.9%, and 77.7% in dry, wet, and semi-wet seasons, respectively. But the effluent coliform in all seasons was above the national standard. Although the WSP removes nitrate up to 45% (0.85 mg/L effluent), 70.2% (0.56 mg/L effluent), and 40 % (1.50 mg/L effluent) was in dry, wet, and semi-wet seasons respectively. The removal efficiency of the stabilization pond for Phosphate was 78.5% (5.51 mg/L effluent), 56.3% (5.1 mg/L effluent), and 37.2% (20.5 mg/L effluent) in dry, wet, and semi-wet seasons, respectively. Most of the physicochemical parameters were in line with Ethiopian Environmental Protection Authority guidelines except phosphate. However Bahir dar university peda campus WSP showed above up to 99% coliform and up to 78% nutrient removal, the effluent water quality of WSP is not suitable for drinking, recreation, and agriculture. Therefore, to improve the efficiency of the WSP and to produce adequately treated water; frequent monitoring and maintenance of the pond are needed. Further research should be conducted in the BDU Peda Campus waste stabilization pond to investigate other performance indicator parameters of waste stabilization pond like biological oxygen demand and total suspended solid.