According to the statistical data of the EPA auto-monitoring stations (the station of Tainan and Annan) in Tainan, the days of PSI>100 of the two stations mostly caused by the suspend particle in air. The Environmental Protection Bureau of government in Tainan city in order to cooperate with in EPA’s air quality plan ‘strengthen the wind-borne dust of the washing and sweeping street plan’, extend and carry out in the year before last ‘strengthened the wind-borne dust of the wash and swept street plan in Tainan city’, it is aimed at around the stations and populous place, traffic flow heavy and have serious wind-borne dust areas, have priority to carry out and improve the measure of the washing and sweeping street plan, to achieve the purpose of the improvement of the air quality.

strengthen the wind-borne dust of the washing and sweeping street plan