This project analyzes the data collected from monitoring stations located in Taipei-Taoyuan area in the past 10 years, in order to discuss the accumulative effect of ozone in Taipei basin, as well as the high concentration of ozone in Taipei metropolitan area. The result of this study shows the Yangmin station has the highest records in the past 10 years with the value between 10th and 70th decimals. The daily maximum and minimum hour-average-values are also the highest in the last 3 years. The records of this station also show minor variation compared with those of other stations. The reason might due to its higher elevation the distance from metropolitan area for light traffic resulting in weaker concentration of NOx in the background, which is the usual mechanism that reduces ozone through chemical reaction. Another reason which cause the high concentration of these two stations during the night time is the land-sea wind changing phenomena. The result of calculating records collected from the monitoring stations systems shows there is a space to adjust a hour-value and -hour-value, in order to achieve the air quality maintenance effect by both standard values. The comparison of records from Shangkun station and Taipei-Taoyuan area concentration distribution map shows Shangkun has lower value in July and maximum-minimum value are higher than other stations. There is no significant increase of ozone in mountain area according to the data recorded at Pingling station. This shows that there is no urgent need on establishing any additional station in southeast area of Taipei basin. The current stations are able to estimate the distribution of concentration of ozone of this area. However, the six month restriction of this project should be extended to acquire better result. One could take the result of this project in the website of the department of Environment Safety and Health, Tung Nan Institute of Technology. Users would be able to inquire the change of concentration of major ozone event days in the past 10 years.

ozone,air quality,monitoring