The Environmental Protection Administration issues the decree of Hot Spring Wastewater Management to cope with the conditions of over half of hot springs locate in the protected area of source water quality and quantity. Based on the pollution source and characteristics of hot spring, this study focuses on the hot spring wastewater investigation and pollution inventory in order to plan control schemes that may serve as the direction of administrative system and measures initiation for hot spring wastewater management in the future, as well as to maintain river water quality, ecosystem, and sustainable usage in the hot spring area. According to the analysis results, the relationship between water quality and inherent of hot spring is very closed. A 65% of hot springs are sodium bicarbonate type of spring and the rest are sulfate and/ or chlorocarbonate type. Meanwhile, the pH value of hot springs in the Yang-Ming Mountain area are 1-2 for greenish sulfate spring or 3-5 for white sulfate spring, however, the pH value may up to 9 for some basic spring. In terms of other pollutants, E. Coli count 500-100 (CFU/100mL), suspended solid 0.35-5 mg/L, and some other rare compounds (i.e. chloride and sulfate ions) that all meet with current effluent criteria. From the results of survey, most hot spring operators combine the gray and black water together and discharge to water body. It thus, the E. Coli count and suspended solid concentration are increased significantly, 1,150,000-60,000 (CFU/100mL) and 1~30 mg/L respectively. To investigate the fish and algae in the aqua system from the whole of watershed in hot spring area, the results revealed that the wastewater quality and quantity of hot spring affect the river water quality and its ecosystem remarkably. Wastewater separation and segregate treatment may significantly reduce the impacts of hot spring wastewater discharge to water body.

hot spring,hot spring wastewater