This project carries on water quality monitoring to five kinds of water bodies of ten counties and cities in the northern Taiwan. The changes of water quality to the time and pollution assessment for those water bodies could be provided to the relevant environmental agencies for making a sound pollution control decision. The monitored result in water quality of rivers and creeks in 2007 shows that the water quality in Yilan and Hualien cities was good, the percentage of assessed result classified into the non(slight)-polluted grade was about 55%, the heavy-polluted grade was only about 1%；A critical distinguishes between upstream & downstream was shown in Danshuei-river, the downstream got a high pollution concentration of organic matter and NH3-N, the percentage of assessed result in Danshuei-river classified into the non(slight)-polluted grade was about 48%, the heavy-polluted grade was about 13%；In Taoyuan & Hsinchu cities, Touchien-stream got the best water quality, the water quality in Nankan-stream, Laochieh-stream, Jiadong-stream, Keya-stream, were worse, especially in Laochieh-stream the monitored data of copper and zinc showed a long-time high concentration. The percentage of assessed result in Taoyuan & Hsinchu cities classified into the non(slight)-polluted grade was about 35%, the heavy-polluted grade was about 8%, the middle-polluted grade was 44%. On the other hand, the seasonal results of 43 coastal monitoring spots for the 8 marine water regions appeared that none was ever found exceeding their relative marine water quality standards in all marine regions. The water quality in eastern sea area was better than in western, Taiwan coastal waters was better than off-shore island waters and estuary. In addition, two recreational coasts in this project, except the Fulong beach was found exceeding the water quality standard on May 28, June 11 and September 10 because of the influence of rainfall, the water quality of these two coastal regions seems to be good. Regarding on the reservoir water quality, the results of monitoring spots for the dams show that reservoirs in Keelung and Hsinchu were mesotrophic to eutrophic level, Feitsui and Shihmen Reservoir were mesotrophic, and the reservoirs in Kin Men and Matsu were analyzed to be on a situation of eutrophication. Finally, ground water monitoring results show that as usual, Ammonia-Nitrogen(NH3-N), Iron(Fe) and Manganese(Mn) are the major items against the Ground Water Monitoring Standard in second category.

Water Quality Monitoring, Water Quality Standards, Method Detection Limit