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2017-2023
World's most polluted cities
Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)
2023
World Air Quality Report
PM2.5 legend
0-5
Meets WHO guideline
5.1-10
Exceeds by 1 to 2 times
10.1-15
Exceeds by 2 to 3 times
15.1-25
Exceeds by 3 to 5 times
25.1-35
Exceeds by 5 to 7 times
35.1-50
Exceeds by 7 to 10 times
>50.1
Exceeds by over 10 times
Rank | City | 2023 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 501 |  Jurong, China | 32.9 | 49.6 | 45.8 | 43.8 | 37.4 | 27.9 | 19.4 | 9 | 14.4 | 19.6 | 29.4 | 40.3 | 58.6 | 33.5 | 34.6 | 37.3 | 43.8 | 50.7 | 47.5 |
| 502 | Lianyungang, China | 32.9 | 54 | 39 | 47.3 | 33.3 | 25.2 | 18.5 | 14 | 13.7 | 19.5 | 29.8 | 40.6 | 56.9 | 29.1 | 32.2 | 36.1 | 42.1 | 43.4 | 45 |
| 503 | Xiaoshan, China | 32.9 | 43.9 | 35 | 38.3 | 33.4 | 28 | 26.9 | 16.5 | 20.8 | 23.9 | 31.2 | 35.8 | 58.4 | 30.3 | 27 | -- | -- | -- | -- |
| 504 |  Alasehir, Turkey | 32.9 | 24.9 | 17.9 | 15.7 | 16.2 | 35 | 42.9 | 58.9 | 57.3 | 31 | 28.5 | 48.5 | 26.7 | -- | -- | -- | -- | -- | -- |
| 505 | Jiuquan, China | 32.8 | 51.7 | 37.3 | 41.8 | 42.1 | 32.4 | 24.4 | 25.6 | 26.3 | 25.8 | 23.2 | 29.1 | 33.9 | 30.9 | 31 | 30.1 | 27.6 | 33.3 | 34.5 |
| 506 |  Kattivakkam, India | 32.8 | 41.8 | 45.7 | 32.6 | 21.9 | 30 | 25.2 | 21.5 | -- | 19.9 | 34 | 30.4 | 43.5 | 20.1 | 23.2 | -- | -- | -- | -- |
| 507 |  Palembang, Indonesia | 32.8 | 4 | 3 | 2.3 | 2.7 | 3 | 12.5 | 18.3 | 34.9 | 89.8 | 137.5 | 47.9 | 22 | 8.4 | 26 | 23.4 | -- | -- | -- |
| 508 |  Loei, Thailand | 32.8 | 31.2 | 52.4 | 81.9 | 93.9 | -- | 11.3 | 8.7 | 15.1 | 6.2 | 6.9 | 19.8 | 24.7 | -- | -- | -- | -- | -- | -- |
| 509 | Tha Phon, Thailand | 32.8 | 37.7 | 58.1 | 78.9 | 67 | 34.8 | 15.1 | 12.9 | 19.3 | 10.6 | 15.6 | 23.2 | 22.2 | -- | -- | -- | -- | -- | -- |
| 510 | Baiyin, China | 32.7 | 45 | 42 | 46.5 | 50.7 | 31.9 | 22.7 | 18 | 19.8 | 18.8 | 21.1 | 35 | 40.9 | 29.2 | 31.8 | 28.7 | 31.1 | 37.7 | 37.3 |
| 511 |  Olifantsfontein, South Africa | 32.7 | 13.5 | 10.3 | 17.7 | 35.4 | 39 | 72.3 | 68.1 | 44.4 | 41.8 | 24.5 | 15 | 12.4 | -- | -- | -- | -- | -- | -- |
| 512 | Wuzhen, China | 32.6 | -- | -- | 33.2 | 34.5 | 31.6 | 27.9 | 17.6 | 21.8 | 24.2 | 33.1 | 41.9 | 59.8 | 28.4 | 26.6 | -- | -- | -- | -- |
| 513 | Baotou, China | 32.5 | 43.4 | 35.9 | 42.3 | 45.8 | 31.5 | 15.4 | 17.1 | 17.3 | 18.3 | 26.1 | 29.8 | 65.4 | 27 | 35.1 | 41.4 | 36.1 | 36.8 | 43.3 |
| 514 |  Talas, Kyrgyzstan | 32.5 | 80.8 | 64.4 | 30.9 | 18.7 | 10.9 | 7.7 | 6.7 | 7.4 | 12.4 | 27.5 | 39.7 | 84.9 | 79.4 | -- | -- | -- | -- | -- |
| 515 | Chang Khoeng, Thailand | 32.5 | 33.1 | 69.6 | 94 | 138.1 | -- | -- | 9.3 | 7.9 | 8.7 | 8.7 | 8.1 | 12 | 29 | -- | -- | -- | -- | -- |
| 516 | Mae On, Thailand | 32.5 | 33.2 | 54.3 | 87.2 | 97.8 | 32.4 | 11.8 | 6.6 | 11.9 | 7.3 | 9.9 | 16.7 | 20.7 | 32.6 | 56.9 | -- | -- | -- | -- |
| 517 | Pak Nam, Thailand | 32.5 | 39.3 | 48.5 | 40.6 | 43.9 | -- | 18.8 | 20.5 | 20.6 | 18.9 | 27.5 | 37.8 | 43.5 | 30.4 | -- | -- | -- | -- | -- |
| 518 |  Nacimiento, Chile | 32.4 | 13.4 | 51.3 | 11.6 | 23.7 | 52 | 56.1 | 71.9 | 54.1 | 30.5 | 16.5 | 11.1 | 8.5 | 22.4 | 26.2 | 27.3 | -- | -- | -- |
| 519 | Chizhou, China | 32.4 | 57 | 46.4 | 36.8 | 33.4 | 26 | 19 | 9.3 | 16.9 | 20.4 | 29.3 | 32.5 | 55.7 | 32.8 | 30.6 | 33.6 | 42.4 | 43.7 | 60.4 |
| 520 | Hohhot, China | 32.4 | 51.1 | 35 | 41.4 | 44.2 | 29.3 | 16.9 | 16.7 | 15.7 | 18.3 | 32.1 | 25.7 | 59.8 | 23.7 | 30.8 | 39.4 | 36.4 | 35.3 | 41.2 |
| 521 | Sujiatun, China | 32.4 | 46.3 | 51.4 | 43 | 40 | 20.2 | 16.6 | 15.8 | 13.9 | 17 | 34.7 | 36.1 | 52.1 | -- | -- | -- | -- | -- | -- |
| 522 | Vereeniging, South Africa | 32.4 | 19.9 | 16.6 | 24.2 | 35.8 | 31.2 | 51.7 | 54 | 50.9 | 36.3 | 26.7 | 22.5 | 18.7 | 24.7 | 26.6 | 26.5 | 30 | -- | -- |
| 523 | Dingxi, China | 32.3 | 55.5 | 40.2 | 40.2 | 42.1 | 24.8 | 21.8 | 18.3 | 18.5 | 18.3 | 22.4 | 37.1 | 48.1 | 29.8 | 25.8 | 25.7 | 27.4 | 40.3 | 39.2 |
| 524 | Karauli, India | 32.3 | -- | -- | 17.7 | 25.5 | 24.9 | 20.8 | 33.3 | 22.3 | 17.4 | 32.4 | 53.6 | 71 | -- | -- | -- | -- | -- | -- |
| 525 | Akasia, South Africa | 32.3 | 25.4 | 34.7 | 30.6 | 39 | 44 | 35.1 | 31.1 | 26.4 | 29.5 | 53.1 | 20 | 16.8 | -- | -- | -- | -- | -- | -- |
| 526 | Wuhai, China | 32.2 | 45.6 | 42.2 | 44.3 | 52.5 | 29.9 | 16.1 | 22.7 | 20.8 | 23.9 | 22.9 | 26.4 | 39.9 | 30.2 | 30.4 | 33.7 | 31.3 | 40.5 | 43.7 |
| 527 | Rizhao, China | 32.2 | 51.2 | 37.5 | 46.1 | 32.3 | 27.3 | 19.6 | 15.1 | 13.5 | 20.1 | 29.6 | 36.2 | 55.5 | 29.2 | 32.7 | 37.5 | 46.2 | 41.6 | 46.8 |
| 528 | Pak Khwae, Thailand | 32.2 | 39.9 | 63.5 | 83.6 | 74.6 | 27 | 8.3 | 6.1 | 12.4 | 6.6 | 5.3 | 20.3 | 27.2 | -- | -- | -- | -- | -- | -- |
| 529 | Suthep, Thailand | 32.1 | 31.6 | 52.2 | 96.5 | 103.9 | 27.8 | 9 | 4.7 | 10.1 | 6.1 | 8.2 | 15.9 | 21.1 | -- | -- | -- | -- | -- | -- |
| 530 | Fuxin, China | 32 | 41.6 | 45.5 | 58.6 | 34 | 28.9 | 18.5 | 21.4 | 17.4 | 20.5 | 28.4 | 26.6 | 41.5 | 27.6 | 32.5 | 35.1 | 36.3 | 36.2 | 39.7 |
| 531 | Ya'an, China | 32 | 60.6 | 47.9 | 30.3 | 25 | 23.6 | 18.3 | 18.1 | 13.6 | 19.3 | 21.6 | 34.5 | 69.4 | 29.3 | 28.3 | 26.6 | 32.3 | 40.7 | 49.2 |
| 532 | Mudu, China | 31.9 | 44.2 | 33.4 | 37.3 | 34.9 | 28.7 | 24.5 | 17.1 | 18.8 | 19.9 | 26.8 | 37 | 58.1 | 31.5 | 27.1 | -- | -- | -- | -- |
| 533 | Nanchang, China | 31.9 | 54.3 | 46.3 | 39.8 | 27 | 26.9 | 17.5 | 12.1 | 17.8 | 18.8 | 33.3 | 37.3 | 52 | 29.4 | 30.7 | 32.5 | 34.9 | 28.4 | 40.9 |
| 534 | Jiaonan, China | 31.9 | 48.9 | 37.6 | 45 | 31.2 | 27.6 | 21.1 | 16.3 | 16.2 | 20.2 | 27.7 | 33.5 | 55.5 | 26 | 29.4 | 34.1 | 39.5 | 33.6 | 40.1 |
| 535 | Linan, China | 31.9 | 45.2 | 38.3 | 37.6 | 33.1 | 28.9 | 22.8 | 13.3 | 18 | 23.8 | 30.6 | 35 | 54.5 | 26.1 | 26.4 | 29.2 | 36.1 | 35.9 | 41.2 |
| 536 |  Banting, Malaysia | 31.9 | 23.1 | 23.3 | 19.9 | 37.7 | 30.8 | 34.1 | 30.4 | 35.5 | 38.8 | 58.5 | 25.7 | 24.1 | 21.9 | 26 | 20.2 | 19.1 | -- | -- |
| 537 | Ban Waen, Thailand | 31.9 | 38.7 | 52.6 | 87.1 | 95.3 | 23.6 | 8.4 | 5.6 | 9.7 | 5.9 | 8.8 | 20.8 | 26.7 | 25.4 | -- | -- | -- | -- | -- |
| 538 | Lat Sawai, Thailand | 31.9 | 36.8 | 45.9 | 49.5 | 49.7 | 25.8 | 11.5 | 10.1 | -- | -- | 23.2 | 26.4 | 30.5 | 23.2 | -- | -- | -- | -- | -- |
| 539 | Suzhou, China | 31.8 | 44.1 | 33.1 | 37.2 | 35.3 | 28.6 | 23.9 | 16.2 | 18.7 | 20.4 | 26.8 | 36.7 | 59 | 28.4 | 28.6 | 32.3 | 37.7 | 40.3 | 41.5 |
| 540 | Xiaoshi, China | 31.8 | 45.7 | 46.4 | 39.7 | 42.7 | 23.3 | 21.4 | 19.8 | 19.4 | 21 | 29.8 | 31 | 42.8 | -- | -- | -- | -- | -- | -- |
| 541 | Jiashan, China | 31.8 | 41.7 | 31.3 | 36.1 | 34.1 | 27.8 | 25 | 16.8 | 19.3 | 21.3 | 28.1 | 38.3 | 61.4 | 23.5 | 20.9 | -- | -- | -- | -- |
| 542 | Shaoxing, China | 31.8 | 44.2 | 33.6 | 37.1 | 31.8 | 27.7 | 26.8 | 16.5 | 20 | 22 | 31.2 | 33.8 | 54.6 | 30 | 27.7 | 28.5 | 38.1 | 40.5 | 44.3 |
| 543 | Sokuluk, Kyrgyzstan | 31.8 | 104.9 | 72.7 | 35.6 | 17.6 | 13.4 | 13.9 | 12 | 11.4 | 12.7 | 21.6 | 41.4 | 40.2 | 72.1 | -- | -- | -- | -- | -- |
| 544 |  Pachacamac, Peru | 31.8 | 35.4 | 20.9 | 21.5 | 23.9 | 35.1 | 38.7 | 35.2 | 32.9 | 31.9 | 35 | 33.8 | 31.9 | 45.8 | -- | -- | -- | -- | -- |
| 545 | Vereeniging NU, South Africa | 31.8 | 24.1 | 20.1 | 24.2 | 28.9 | 31.1 | 49.3 | 47.5 | 41.6 | 31.5 | 27.6 | 24.8 | 23.8 | -- | -- | -- | -- | -- | -- |
| 546 | Chang Klan, Thailand | 31.7 | 36.6 | 67.1 | 120.2 | 109.1 | 33.3 | 11.2 | 6.9 | 13 | 8.2 | 11.6 | 21.9 | 28.5 | -- | -- | -- | -- | -- | -- |
| 547 | Wiang Chai, Thailand | 31.7 | -- | -- | 252.5 | 120.9 | 30.8 | 9.7 | 6 | 8.8 | 7.8 | 9.6 | 20.8 | 25.7 | -- | -- | -- | -- | -- | -- |
| 548 | Pang Mu, Thailand | 31.7 | 26.6 | 43.3 | 131.7 | 143.1 | -- | 7 | 4.3 | 7.2 | 5.3 | 5.1 | 9.3 | 14.5 | 22.7 | -- | -- | -- | -- | -- |
| 549 | Mae Pa, Thailand | 31.7 | 41.3 | 78 | 80.6 | 57.5 | -- | 9.8 | 9.9 | 12.1 | 9 | 11.7 | 19.6 | 30.6 | 19.1 | -- | -- | -- | -- | -- |
| 550 | Fushun, China | 31.6 | 43.1 | 48.8 | 43 | 48 | 22.3 | 18.4 | 17.3 | 14.4 | 16.8 | 30.5 | 30.7 | 43.6 | 33.5 | 39.7 | 43.3 | 43 | 41.2 | 47.2 |
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