Determining the water quality of agricultural irrigation ponds has great importance both for agricultural production and for aquatic organisms. In this study, seasonal changes of the physico-chemical parameters and metal concentrations of water in Terzialan Pond were investigated. In 2019, physico-chemical analysis of the water samples taken from four sampling points are made according to APHA (2012) standard method, determining metal concentrations with ICP-OES. The water quality of the pond is evaluated according to YSKYY, ITASHY and TS266 classes. Terzialan Pond, according to Surface Water Quality Management Regulations is found to be second quality in terms of phosphate concentration and first quality in other parameters. The pond can be used as agricultural irrigation water being in C2-S1 class according to US Salinity Laboratory diagram and very good- good class according to Wilcox diagram. Changes in water quality are observed due to anthropogenic effects depending on seasonal agricultural and recreational activities, besides natural effects. Periodic monitoring of the pond will be beneficial for environmental management.