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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 601 |  Sirohi, India | 30.2 | 67 | 25.1 | 21.6 | 10.6 | 21.9 | 33.2 | 20.5 | 27.8 | 16.6 | 29.8 | 55.6 | 46 | -- | -- | -- | -- | -- | -- |
| 602 |  Phrae, Thailand | 30.2 | 37.1 | 63.6 | 71 | 84.9 | -- | 12.3 | 10.8 | 15.3 | 10.2 | 12.8 | 20.7 | 25.7 | -- | -- | -- | -- | -- | -- |
| 603 | Uthai Thani, Thailand | 30.2 | 40 | 48.9 | 58 | 65.1 | -- | 13 | 12.7 | 16.3 | 13.2 | 15.5 | 26.6 | 37.1 | 24.7 | 23.9 | 19 | -- | -- | -- |
| 604 |  Banja Luka, Bosnia Herzegovina | 30.1 | 53.6 | 47.1 | 25 | 21.9 | 18.3 | 14.2 | 13.3 | 16 | 16.1 | 15.1 | 36.2 | 84.5 | 37.1 | 26.4 | 25 | -- | -- | -- |
| 605 |  Fuling, China | 30.1 | 70.7 | 46.4 | 30.3 | 26.1 | 23.1 | 17.2 | 13.9 | 14.2 | 17.9 | 21 | 35.9 | 57.5 | 28.5 | 29 | 28 | 28.3 | -- | -- |
| 606 | Phitsanulok, Thailand | 30.1 | 36.1 | 59.3 | 73.7 | 67.5 | 24.1 | 9.7 | 8.6 | 15.6 | 6.5 | 8.8 | 22.8 | 31.1 | 20.7 | 25 | 24.6 | -- | -- | -- |
| 607 |  Duzce, Turkey | 30.1 | 58.8 | 41.8 | 27.1 | 19 | 16.5 | 16.6 | 18.8 | 24 | 16.9 | 27.7 | 31.4 | 63.1 | 36.8 | 44.4 | 33.3 | 46 | -- | -- |
| 608 | Dalian, China | 30 | 39.9 | 46.4 | 42.7 | 35.2 | 26.5 | 19.7 | 18.7 | 17.9 | 20.5 | 25.7 | 28.5 | 38.2 | 23.6 | 27.7 | 30.2 | 34.3 | 29.3 | 32.9 |
| 609 | Lvliang, China | 30 | 43.6 | 43.8 | 32 | 35.3 | 19.5 | 14.8 | 18.5 | 23.4 | 25.5 | 30 | 29.6 | 44.9 | 26.8 | 32.6 | 36 | 40.1 | 50.7 | 55.2 |
| 610 |  Nilai, Malaysia | 30 | 23.6 | 15.8 | 24.6 | 40.8 | 29 | 31.2 | 28 | 38.7 | 44.4 | 46.6 | 20.4 | 15.4 | 22.6 | 24.8 | 22.8 | 19.9 | -- | -- |
| 611 | Doboj, Bosnia Herzegovina | 29.9 | 49.9 | 57.6 | 29.3 | 21.9 | 19.7 | 21.2 | 20 | 22.9 | 21.3 | 17.8 | 16.9 | 50.5 | 40.8 | -- | -- | -- | -- | -- |
| 612 | Huaihua, China | 29.9 | 67 | 46.9 | 34.6 | 29.8 | 24.6 | 17.6 | 14.2 | 18.3 | 19.9 | 22.7 | 25.4 | 39.6 | 27.8 | 27.4 | 27.8 | 35.4 | 33.1 | 38.1 |
| 613 | Iskenderun, Turkey | 29.9 | 50.1 | 97.7 | 30.8 | 22 | 19.7 | 18.6 | 18.9 | 23.1 | 21.3 | 25.6 | -- | -- | 28.4 | 24.8 | -- | -- | -- | -- |
| 614 | Xianning, China | 29.8 | 55.7 | 40.6 | 30.8 | 24.6 | 25.1 | 18.7 | 12 | 19.2 | 18.3 | 36 | 29.2 | 46.2 | 27 | 26.8 | 29.1 | 35.1 | 36.7 | 46.5 |
| 615 |  Soweto, South Africa | 29.8 | 17 | 12.6 | 20.4 | 32.4 | 26.4 | 49.3 | 58.2 | 53.9 | -- | 31.3 | 26.6 | 16.9 | -- | -- | -- | -- | -- | -- |
| 616 | Chang Phueak, Thailand | 29.8 | 30.7 | 49.8 | 88.7 | 95 | 20.5 | 8.8 | 6.3 | 10.6 | 6.5 | 7.4 | 13.8 | 21.2 | -- | -- | -- | -- | -- | -- |
| 617 | Hubli, India | 29.7 | 52.4 | 62.6 | 46.5 | 35.8 | 25.4 | 16.6 | 11.9 | 16 | 18.4 | 22.9 | 24.6 | 24.5 | 32.1 | 29.7 | 25.2 | -- | -- | -- |
| 618 | Kolhapur, India | 29.7 | -- | -- | -- | 21.4 | 20.3 | 17.8 | 21.7 | 13.5 | 15.7 | 38.9 | 50.9 | 59.8 | -- | -- | -- | -- | -- | -- |
| 619 |  Vientiane, Laos | 29.7 | 37 | 43.7 | 63.5 | 59.6 | 23.7 | 11.2 | 9.4 | 14.8 | 9.8 | 17.9 | 32.5 | 34.9 | 27.6 | 21.5 | 22.4 | 23.1 | -- | -- |
| 620 | Xinyu, China | 29.6 | 47.7 | 35.1 | 34.4 | 25.3 | 25 | 19.6 | 15.2 | 22.1 | 22.6 | 32.3 | 33.2 | 43.5 | 27.2 | 30.8 | 29.9 | 35.1 | 37.7 | 47.6 |
| 621 | Kumul, China | 29.6 | 55.1 | 37.3 | 34.2 | 28.6 | 24.6 | 17.4 | 20.7 | 20.6 | 21.5 | 23.7 | 31.5 | 38.7 | 26.7 | 28.2 | 29.3 | 29.8 | 28.5 | 31.9 |
| 622 | Shangyu, China | 29.6 | 39.6 | 33.3 | 34.3 | 31 | 25.3 | 24.4 | 14.1 | 18.1 | 21.2 | 30.1 | 31.7 | 50.4 | 25.9 | 23 | -- | -- | -- | -- |
| 623 | Om Noi, Thailand | 29.6 | 39.2 | 40.3 | 42.8 | 39.7 | -- | 16.8 | 17.1 | 20.1 | 16.5 | 25.5 | 31.6 | 37.4 | 23.6 | -- | -- | -- | -- | -- |
| 624 | Wuxi, China | 29.5 | 41.1 | 30.9 | 33 | 32.2 | 26.3 | 20.9 | 13.3 | 18.1 | 21.1 | 28.2 | 34.1 | 52.3 | 28 | 29.8 | 34 | 39.9 | 42.8 | 45.1 |
| 625 | Xining, China | 29.5 | 42.3 | 41.7 | 39.3 | 38.2 | 24.9 | 17.6 | 17.1 | 17.6 | 18.7 | 22.9 | 34.9 | 39.3 | 29.3 | 32.2 | 33 | 33.3 | 41.7 | 38 |
| 626 | Qingdao, China | 29.5 | 44.2 | 37.5 | 42.6 | 28.6 | 25.2 | 18.6 | 14.6 | 14.8 | 17.4 | 24.1 | 32.5 | 52.3 | 25.2 | 29.7 | 31.8 | 39.4 | 34.3 | 38.4 |
| 627 | Kochi, India | 29.5 | 35 | 31.4 | 43.3 | 33.5 | 35.7 | 31.1 | 29.6 | 28.4 | 19.4 | 24 | 25.5 | 13.7 | 30.7 | 24.6 | 19 | -- | -- | -- |
| 628 | Bueng Kham Phroi, Thailand | 29.5 | 42.8 | 58.4 | 75.4 | 68.2 | 26.9 | 8.9 | 7.3 | 10.8 | 6.4 | 7.6 | 19.2 | 26.1 | 11 | -- | -- | -- | -- | -- |
| 629 |  Padre las Casas, Chile | 29.4 | 4.3 | 5.9 | 10.4 | 24.1 | 46 | 72 | 52.4 | 47.8 | 35.2 | 19.9 | -- | 4.6 | 33.8 | 37.2 | 28.6 | 32.5 | 43.3 | 38.8 |
| 630 | Nanjing, China | 29.4 | 42.7 | 34.7 | 37.3 | 33.7 | 25.9 | 19.5 | 11.6 | 15.9 | 17.4 | 27.7 | 35 | 49.1 | 27.7 | 29 | 31.1 | 40.5 | 43 | 40.5 |
| 631 | Xiaolingwei, China | 29.4 | 43.8 | 35.1 | 35.4 | 32.3 | 24.8 | 19.4 | 12.8 | 17.6 | 18.3 | 27.7 | 34.5 | 49.2 | 28.5 | 29.3 | -- | -- | -- | -- |
| 632 | Yichun, China | 29.4 | 48.8 | 34.3 | 34.1 | 25 | 25.7 | 20.7 | 16 | 21.9 | 22.9 | 32.5 | 31.4 | 40.2 | 27.1 | 30.4 | 30.8 | 35.7 | 38.7 | 51 |
| 633 | Songjiang, China | 29.4 | 34.9 | 25.6 | 32.8 | 40.3 | 32.7 | 25.7 | 17.7 | 17.4 | 20.6 | 26.9 | 35.4 | 50.8 | 35.8 | 26.1 | -- | -- | -- | -- |
| 634 | Jiaxing, China | 29.4 | 41.7 | 33 | 34.9 | 31.9 | 26.5 | 22.4 | 15.2 | 16.4 | 17.8 | 24.4 | 33.9 | 53.5 | 26.2 | 26.5 | 27.7 | 35 | 38.1 | 41.5 |
| 635 | Tilak Nagar, India | 29.4 | 26.5 | 23.6 | 32.8 | 29.3 | 36.2 | 30.7 | 21.7 | 18.9 | 18.8 | 43.9 | 27.3 | 50.3 | -- | -- | -- | -- | -- | -- |
| 636 | Haldia, India | 29.4 | 65.2 | 37.2 | 27.8 | 25 | 15.3 | 16.1 | 8.1 | 19.7 | 11.2 | 30.9 | 47.4 | 49.5 | 29.9 | 33.4 | -- | 25.9 | -- | -- |
| 637 | Xingbin Qu, China | 29.3 | 56.5 | 41.1 | 40.1 | 30.3 | 24 | 15.8 | 16.4 | 14.7 | 16.3 | 23 | 32.9 | 39 | 30.1 | 34 | 30.4 | 35.2 | 39.5 | 48.1 |
| 638 | Tongliao, China | 29.3 | 35.1 | 33.2 | 44.5 | 35.9 | 31.7 | 22 | 21.8 | 15.4 | 18.9 | 26.8 | 33.2 | 32.9 | 26.5 | 23.5 | 28.8 | 32.3 | 31.9 | 34.3 |
| 639 | Salem, India | 29.3 | 39.4 | 37.8 | 25.5 | 31.6 | 26.8 | 20.2 | 15.1 | 18.9 | 17.4 | 42 | 28.6 | 45.6 | 28.7 | 21.4 | -- | -- | -- | -- |
| 640 | Khlong Nung, Thailand | 29.3 | 35.3 | 43.2 | 43.7 | 38.5 | 19.8 | 9.6 | -- | -- | 6.5 | 18 | 20 | 26.3 | -- | -- | -- | -- | -- | -- |
| 641 | Novi Grad, Bosnia Herzegovina | 29.2 | 53.6 | 69.9 | 40.1 | 29.3 | 20.7 | 27.7 | 6 | 15.5 | 12.5 | 11.8 | 9.1 | 18.5 | 45.5 | 46.6 | -- | -- | -- | -- |
| 642 | Guilin, China | 29.2 | 54.3 | 41 | 45.8 | 31.8 | 23.4 | 15.7 | 14.2 | 13.1 | 16.5 | 24.2 | 30.8 | 40.3 | 26.2 | 28.6 | 28.3 | 32.9 | 36.4 | 42.2 |
| 643 | Yongfeng, China | 29.2 | 81.6 | 39.9 | 17.2 | 30.1 | 29 | 19.3 | 16.4 | 21.9 | 23.4 | 36.4 | 36.2 | 46.4 | 33.1 | 39.9 | -- | -- | -- | -- |
| 644 |  Xonacatlan, Mexico | 29.2 | 33.9 | 32.7 | 30.6 | 31.7 | 32 | 24.7 | 24.4 | 25.2 | 26.4 | 26.6 | -- | -- | 28.5 | -- | -- | -- | -- | -- |
| 645 | Bihac, Bosnia Herzegovina | 29.1 | 42 | 49.1 | 43.2 | 38.6 | 36.8 | 19.2 | 14.7 | 16.7 | 17.9 | 16.7 | 20 | 32.9 | 29.5 | 33 | -- | -- | -- | -- |
| 646 | Chengzihe, China | 29.1 | 57.6 | 43.9 | 33.3 | 46.6 | 22.5 | 13.2 | 11.4 | 9.2 | 14.2 | 23.5 | 32.8 | 40.3 | 31.5 | 35.1 | -- | -- | -- | -- |
| 647 | Coraut, India | 29.1 | 42.2 | 27.8 | 24 | 34.7 | 27.9 | 33.4 | 16.7 | 18.1 | 12.1 | 27.3 | 48.8 | 34.9 | 35 | -- | -- | -- | -- | -- |
| 648 | Shah Alam, Malaysia | 29.1 | 22.1 | 20.8 | 22.1 | 29.7 | 24.9 | 29.3 | 25.8 | 39.6 | 53.1 | 48.3 | 17.3 | 15.6 | 26.7 | 27.4 | 21.1 | 20.4 | -- | -- |
| 649 | Hanoi, Bosnia Herzegovina | 29 | 75.7 | 38.6 | 34.6 | 14.7 | 11.6 | 11.8 | 13.6 | 16.3 | 11.7 | 14.2 | 34.9 | 71.8 | -- | -- | -- | -- | -- | -- |
| 650 | Jiayuguan, China | 29 | 43.2 | 31.4 | 41.2 | 44.5 | 31.9 | 21.8 | 24.7 | 23.3 | 20.8 | 17.6 | 23.5 | 24.2 | 28.3 | 29.3 | 29.5 | 26.5 | 28.1 | 23 |
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