THE ANALYSIS OF POLLUTION LEVEL OF PARTICLES PM10 AND PM2. 5 IN WUHAN AND XI'AN

By using the monitoring data of PM10 and PM2. 5 of Wuhan and Xi'an in 2013，the pollution level of PM10 and PM2. 5 was analyzed and compared between the two cities． According to the secondary concentration limit of“Ambient Air Quality Standards of China”( GB 3095—2012) ，the pollution status of PM2. 5 is very serious both in Wuhan and Xi'an，the pollution of PM10 is relatively lighter． On the whole，the pollution of Xi'an is more serious than Wuhan． The PM2. 5 accounts for about 79% of the total PM10 in Xi' an． The problem of pollution of PM10 and PM2. 5 in Wuhan and Xi' an should be paid attention by relevant departments．