The main purpose of the first year air quality improvement project is to establish the mechanism of cooperation among four districts in central Taiwan, including Taichung county, Taichung city, Changhua county and Nantao county. For the pre-pilot-study planning plan of atmospheric data collection and air pollutants sampling in central Taiwan, we review related literatures of the subject, especially those who emphasized on particulate, ozone and volatile organic compounds. We also examine the air pollution control policies of Nan-Kao-Ping area in southern Taiwan, and conclude the suitable ones for central Taiwan area in the report. We also consult with the experts in related field and provide the proper procedures and expenses of atmospheric data collecting and air pollutants sampling. But the original fund-raising idea from four districts is in vain due to the air pollution protection fee is declining for four districts recently. For central Taiwan area, the allowed percentage of the PSI deterioration of 2004 is 1.57% for Taichung county, also the strictest one among four distrcts, and 2.05% for Changhua county. But all of the four districts fail to achieve their allowed percentage of the PSI deterioration of 2004. Also, we find that the burden of the environment is growing for four districts, such as population, factories and vehicles, especially in Taichung county. The number of factories in Taichung county are eleven folds than that in Nantao county. And this fact makes the air pollution control policies even harder to enforce in Taichung county.

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