中文摘要：

根据四川省遂宁城区2006年1月￣2010年12月大气连续采样监测数据,利用空气污染指数（API）法分析了遂宁城区大气质量时空分布特征。结果表明,近5年来遂宁城区大气首要污染物是PM10,城区SO2、NO2和PM10的污染浓度总体呈下降趋势,大气质量级别为Ⅱ级（良）,污染程度已处于较低水平。大气污染程度呈现冬季〉春、秋季〉夏季的变化规律;污染物浓度顺序在城区分布为群康印染厂〉市监测站〉市行政中心〉石溪浩,空气污染在城区呈现出南高北低的分布特征。

英文摘要：

According to the air monitoring data of Suining urban area from January in 2006 to December in 2010,the spatial and temporal distribution characteristic of air quality in Suining urban area is analyzed by air pollution index（API）.The results show that PM10 is the major air pollutant in Suining urban area in the recent five years,the pollutant concentrations of SO2,NO2 and PM10 gradually show the decreasing trend,the air quality is the second level,and the pollution degree is in low level.The degree of air pollution shows the regularity of winterspring,autumnsummer;the distribution of pollutant concentration is Qunkang Printing Dyeing MillEnvironmental Protection Monitoring StationUrban Administrative CenterShixihao,respectively;air pollution is low in north and high in south in Suining urban area.