2023年1—6月，全(quan)國(guo)339個地(di)級及(ji)以(yi)上(shang)城市平(ping)(ping)均(jun)空(kong)氣質量(liang)優良天(tian)數比(bi)(bi)(bi)(bi)例為(wei)(wei)(wei)81.4%，同(tong)比(bi)(bi)(bi)(bi)下降3.2個百(bai)(bai)分點(dian)；平(ping)(ping)均(jun)重度(du)(du)及(ji)以(yi)上(shang)污(wu)染天(tian)數比(bi)(bi)(bi)(bi)例為(wei)(wei)(wei)2.6%，同(tong)比(bi)(bi)(bi)(bi)上(shang)升1.4個百(bai)(bai)分點(dian)；PM2.5平(ping)(ping)均(jun)濃(nong)度(du)(du)為(wei)(wei)(wei)34微(wei)(wei)(wei)克/立(li)方米，同(tong)比(bi)(bi)(bi)(bi)上(shang)升6.2%；PM10平(ping)(ping)均(jun)濃(nong)度(du)(du)為(wei)(wei)(wei)61微(wei)(wei)(wei)克/立(li)方米，同(tong)比(bi)(bi)(bi)(bi)上(shang)升10.9%；O3平(ping)(ping)均(jun)濃(nong)度(du)(du)為(wei)(wei)(wei)146微(wei)(wei)(wei)克/立(li)方米，同(tong)比(bi)(bi)(bi)(bi)上(shang)升1.4%；SO2平(ping)(ping)均(jun)濃(nong)度(du)(du)為(wei)(wei)(wei)9微(wei)(wei)(wei)克/立(li)方米，同(tong)比(bi)(bi)(bi)(bi)持平(ping)(ping)；NO2平(ping)(ping)均(jun)濃(nong)度(du)(du)為(wei)(wei)(wei)22微(wei)(wei)(wei)克/立(li)方米，同(tong)比(bi)(bi)(bi)(bi)上(shang)升4.8%；CO平(ping)(ping)均(jun)濃(nong)度(du)(du)為(wei)(wei)(wei)1.1毫克/立(li)方米，同(tong)比(bi)(bi)(bi)(bi)持平(ping)(ping)。