經(jing)初步測(ce)算，2023年(nian)重(zhong)慶空(kong)氣質量優良天(tian)(tian)(tian)數達325天(tian)(tian)(tian)（優121天(tian)(tian)(tian)，良204天(tian)(tian)(tian)，輕度(du)污(wu)染(ran)(ran)33天(tian)(tian)(tian)，中(zhong)度(du)污(wu)染(ran)(ran)7天(tian)(tian)(tian)，重(zhong)度(du)污(wu)染(ran)(ran)0天(tian)(tian)(tian)），2020年(nian)以來連(lian)續4年(nian)穩定在(zai)320天(tian)(tian)(tian)以上，2018年(nian)以來連(lian)續6年(nian)無(wu)重(zhong)污(wu)染(ran)(ran)天(tian)(tian)(tian)。其中(zhong)，3月(yue)(yue)(yue)(yue)(yue)(yue)、8月(yue)(yue)(yue)(yue)(yue)(yue)、10月(yue)(yue)(yue)(yue)(yue)(yue)優良率為(wei)(wei)100%，1月(yue)(yue)(yue)(yue)(yue)(yue)超標(biao)(biao)14天(tian)(tian)(tian)，12月(yue)(yue)(yue)(yue)(yue)(yue)超標(biao)(biao)10天(tian)(tian)(tian)，2月(yue)(yue)(yue)(yue)(yue)(yue)超標(biao)(biao)6天(tian)(tian)(tian)，4月(yue)(yue)(yue)(yue)(yue)(yue)、7月(yue)(yue)(yue)(yue)(yue)(yue)、9月(yue)(yue)(yue)(yue)(yue)(yue)、11月(yue)(yue)(yue)(yue)(yue)(yue)各超標(biao)(biao)2天(tian)(tian)(tian)，5月(yue)(yue)(yue)(yue)(yue)(yue)和6月(yue)(yue)(yue)(yue)(yue)(yue)超標(biao)(biao)1天(tian)(tian)(tian)，冬春季(ji)均為(wei)(wei)細顆粒(li)物（PM2.5）濃度(du)超標(biao)(biao)，夏秋(qiu)季(ji)均為(wei)(wei)臭氧（O3）濃度(du)超標(biao)(biao)。

在具體區(qu)(qu)(qu)(qu)縣(xian)方面，1—12月重點區(qu)(qu)(qu)(qu)域優(you)良天數排名前5位(wei)的(de)是：黔江(jiang)(jiang)區(qu)(qu)(qu)(qu)、武隆區(qu)(qu)(qu)(qu)、萬盛(sheng)經開區(qu)(qu)(qu)(qu)、梁平區(qu)(qu)(qu)(qu)、萬州(zhou)區(qu)(qu)(qu)(qu)；排名后5位(wei)的(de)是：渝中區(qu)(qu)(qu)(qu)、合川區(qu)(qu)(qu)(qu)、大渡口區(qu)(qu)(qu)(qu)、江(jiang)(jiang)北區(qu)(qu)(qu)(qu)、南岸區(qu)(qu)(qu)(qu)。一般區(qu)(qu)(qu)(qu)域優(you)良天數排名前3位(wei)的(de)是：酉陽縣(xian)、城口縣(xian)、奉節縣(xian)；排名后3位(wei)的(de)是：墊江(jiang)(jiang)縣(xian)、豐都縣(xian)、巫溪縣(xian)。