Abstarct: In this study the characteristics and environmental impact of integrated warm spring’s wastewater of Sarein tourist town has been studied. For this purpose, firstly the chemical and physical existing data in the Regional Water Organization were collected and analyzed. For detailed study of water quality, 10 samples of output wastewater were taken and the chemical and physical properties and the values of CO2 and H2S of them were measured. Also in four samples of SPA output sewage heavy mextals concentration and amount of detergent were calculated. For interpretation of results, the Piper SO4-Cl-HCO3 triangle charts of all hot spring water and Wilcox diagram of wastewater samples was draw. The results show that the concentration of H2S of all hot springs is more than the standard. Also the waste waters show the pollution of detergents and BOD. The concentration of heavy mextals in wastewater decrase from output location up to Kenzagh river.