經初(chu)步測算，2023年重(zhong)慶空氣質(zhi)量(liang)優(you)良(liang)天(tian)(tian)(tian)數(shu)達325天(tian)(tian)(tian)（優(you)121天(tian)(tian)(tian)，良(liang)204天(tian)(tian)(tian)，輕度(du)(du)污(wu)(wu)染(ran)33天(tian)(tian)(tian)，中(zhong)(zhong)度(du)(du)污(wu)(wu)染(ran)7天(tian)(tian)(tian)，重(zhong)度(du)(du)污(wu)(wu)染(ran)0天(tian)(tian)(tian)），2020年以來(lai)連續(xu)4年穩定在(zai)320天(tian)(tian)(tian)以上(shang)，2018年以來(lai)連續(xu)6年無重(zhong)污(wu)(wu)染(ran)天(tian)(tian)(tian)。其中(zhong)(zhong)，3月(yue)(yue)(yue)(yue)、8月(yue)(yue)(yue)(yue)、10月(yue)(yue)(yue)(yue)優(you)良(liang)率為(wei)(wei)100%，1月(yue)(yue)(yue)(yue)超標14天(tian)(tian)(tian)，12月(yue)(yue)(yue)(yue)超標10天(tian)(tian)(tian)，2月(yue)(yue)(yue)(yue)超標6天(tian)(tian)(tian)，4月(yue)(yue)(yue)(yue)、7月(yue)(yue)(yue)(yue)、9月(yue)(yue)(yue)(yue)、11月(yue)(yue)(yue)(yue)各超標2天(tian)(tian)(tian)，5月(yue)(yue)(yue)(yue)和6月(yue)(yue)(yue)(yue)超標1天(tian)(tian)(tian)，冬春季(ji)均為(wei)(wei)細顆(ke)粒物（PM2.5）濃(nong)度(du)(du)超標，夏秋季(ji)均為(wei)(wei)臭(chou)氧（O3）濃(nong)度(du)(du)超標。

在具體區(qu)(qu)(qu)(qu)縣(xian)方面，1—12月重點區(qu)(qu)(qu)(qu)域(yu)優(you)(you)良天(tian)數排名前5位(wei)的是(shi)：黔江(jiang)區(qu)(qu)(qu)(qu)、武隆區(qu)(qu)(qu)(qu)、萬盛經(jing)開(kai)區(qu)(qu)(qu)(qu)、梁平(ping)區(qu)(qu)(qu)(qu)、萬州區(qu)(qu)(qu)(qu)；排名后5位(wei)的是(shi)：渝中區(qu)(qu)(qu)(qu)、合川區(qu)(qu)(qu)(qu)、大(da)渡口區(qu)(qu)(qu)(qu)、江(jiang)北區(qu)(qu)(qu)(qu)、南岸區(qu)(qu)(qu)(qu)。一般區(qu)(qu)(qu)(qu)域(yu)優(you)(you)良天(tian)數排名前3位(wei)的是(shi)：酉(you)陽縣(xian)、城口縣(xian)、奉節縣(xian)；排名后3位(wei)的是(shi)：墊江(jiang)縣(xian)、豐都縣(xian)、巫溪縣(xian)。