2023年1—6月，全國339個地(di)級(ji)及以上(shang)城市平均(jun)(jun)(jun)空(kong)氣質量(liang)優良天(tian)數(shu)比(bi)(bi)例為81.4%，同(tong)(tong)比(bi)(bi)下降3.2個百分(fen)(fen)點(dian)；平均(jun)(jun)(jun)重度(du)(du)及以上(shang)污染天(tian)數(shu)比(bi)(bi)例為2.6%，同(tong)(tong)比(bi)(bi)上(shang)升1.4個百分(fen)(fen)點(dian)；PM2.5平均(jun)(jun)(jun)濃(nong)(nong)度(du)(du)為34微(wei)克(ke)/立方(fang)米(mi)(mi)，同(tong)(tong)比(bi)(bi)上(shang)升6.2%；PM10平均(jun)(jun)(jun)濃(nong)(nong)度(du)(du)為61微(wei)克(ke)/立方(fang)米(mi)(mi)，同(tong)(tong)比(bi)(bi)上(shang)升10.9%；O3平均(jun)(jun)(jun)濃(nong)(nong)度(du)(du)為146微(wei)克(ke)/立方(fang)米(mi)(mi)，同(tong)(tong)比(bi)(bi)上(shang)升1.4%；SO2平均(jun)(jun)(jun)濃(nong)(nong)度(du)(du)為9微(wei)克(ke)/立方(fang)米(mi)(mi)，同(tong)(tong)比(bi)(bi)持平；NO2平均(jun)(jun)(jun)濃(nong)(nong)度(du)(du)為22微(wei)克(ke)/立方(fang)米(mi)(mi)，同(tong)(tong)比(bi)(bi)上(shang)升4.8%；CO平均(jun)(jun)(jun)濃(nong)(nong)度(du)(du)為1.1毫克(ke)/立方(fang)米(mi)(mi)，同(tong)(tong)比(bi)(bi)持平。