This project focuses on monitoring the noise levels, river water and ground water qualities of Taoyuan County to understand the varying trend of the monitored analytes. The trends of the variations were analyzed and reviewed to provide the Environmental Protection Office a reference for future regulations.There are 12 environmental noise and 12 traffic noise monitoring stations, which were continuously monitored for 48 hours twice every quarter. The 2012 monitoring results show that the noise failure rate was 0%.There are three military reserved well and thirty-two regular monitoring wells which were monitored for groundwater quality. Samples were collected once in both dry and wet seasons. The analytical results of 2011 indicated that the proportion of the wells that exceeded the type II ground water monitoring standards is 19/35. The analytes exceeding standards were ammonia nitrogen（16 out of 70）,iron （18 out of 70）and manganese（22 out of 70）. In addition, the concentration of trichloroethylene found in Nei Ding Elementary School monitoring well of Chung Li industrial park exceeds the type II ground water pollution standards. The result was about 0.11mg/L, which was consistent with the historical data. And China Electric Mfg. Corporation perchloroethylene monitoring results was exceeds the type II groundwater pollution standards at Guishan industrial park.Nineteen monitoring stations for the rivers were sampled once every quarter to monitor the river water qualities. The analytical results of 2012 indicated that most river water bodies were moderately polluted. The analytes that exceeded the Class C internal surface water quality standards were dissolved oxygen（1 out of 19）,coliform group（18 out of 19）,suspended solids（5 out of 19）,biological oxygen demand（18 out of 19）,ammonia nitrogen （19 out of 19）.The analytes that exceeded the environmental standards were zinc（2 out of 19）、copper（10 out of 19）and manganese（19 out of 19）.Only one reservoir was monitored for water quality. Samples were collected once every quarter. The result of 2012 indicated that heavy metals met the Class A internal surface water quality standards and environmental standards.