經初步測算(suan)，2023年(nian)(nian)重(zhong)慶(qing)空氣質量優良天(tian)(tian)(tian)(tian)(tian)數(shu)達(da)325天(tian)(tian)(tian)(tian)(tian)（優121天(tian)(tian)(tian)(tian)(tian)，良204天(tian)(tian)(tian)(tian)(tian)，輕度(du)(du)污(wu)染33天(tian)(tian)(tian)(tian)(tian)，中度(du)(du)污(wu)染7天(tian)(tian)(tian)(tian)(tian)，重(zhong)度(du)(du)污(wu)染0天(tian)(tian)(tian)(tian)(tian)），2020年(nian)(nian)以來(lai)連續(xu)(xu)4年(nian)(nian)穩(wen)定(ding)在320天(tian)(tian)(tian)(tian)(tian)以上，2018年(nian)(nian)以來(lai)連續(xu)(xu)6年(nian)(nian)無重(zhong)污(wu)染天(tian)(tian)(tian)(tian)(tian)。其(qi)中，3月(yue)(yue)(yue)、8月(yue)(yue)(yue)、10月(yue)(yue)(yue)優良率為100%，1月(yue)(yue)(yue)超標14天(tian)(tian)(tian)(tian)(tian)，12月(yue)(yue)(yue)超標10天(tian)(tian)(tian)(tian)(tian)，2月(yue)(yue)(yue)超標6天(tian)(tian)(tian)(tian)(tian)，4月(yue)(yue)(yue)、7月(yue)(yue)(yue)、9月(yue)(yue)(yue)、11月(yue)(yue)(yue)各超標2天(tian)(tian)(tian)(tian)(tian)，5月(yue)(yue)(yue)和6月(yue)(yue)(yue)超標1天(tian)(tian)(tian)(tian)(tian)，冬春季均(jun)(jun)為細顆粒物（PM2.5）濃(nong)度(du)(du)超標，夏秋季均(jun)(jun)為臭(chou)氧(yang)（O3）濃(nong)度(du)(du)超標。

在具體區(qu)(qu)(qu)(qu)縣(xian)方面，1—12月重(zhong)點區(qu)(qu)(qu)(qu)域優(you)良天數排(pai)(pai)名前(qian)5位(wei)的(de)(de)是(shi)：黔江(jiang)區(qu)(qu)(qu)(qu)、武(wu)隆區(qu)(qu)(qu)(qu)、萬(wan)盛經開區(qu)(qu)(qu)(qu)、梁平區(qu)(qu)(qu)(qu)、萬(wan)州區(qu)(qu)(qu)(qu)；排(pai)(pai)名后5位(wei)的(de)(de)是(shi)：渝中區(qu)(qu)(qu)(qu)、合川區(qu)(qu)(qu)(qu)、大渡口區(qu)(qu)(qu)(qu)、江(jiang)北區(qu)(qu)(qu)(qu)、南岸區(qu)(qu)(qu)(qu)。一般(ban)區(qu)(qu)(qu)(qu)域優(you)良天數排(pai)(pai)名前(qian)3位(wei)的(de)(de)是(shi)：酉陽(yang)縣(xian)、城口縣(xian)、奉節縣(xian)；排(pai)(pai)名后3位(wei)的(de)(de)是(shi)：墊江(jiang)縣(xian)、豐都縣(xian)、巫溪縣(xian)。