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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 251 |  Tianchang, China | 42.7 | 56.5 | 84.5 | 59.2 | 46.4 | 32.1 | 22.3 | 23.1 | 27.9 | 32.5 | 38.3 | 41.6 | 51.8 | 42 | 37.5 | -- | -- | -- | -- |
| 252 |  Patiala, India | 42.7 | 58.5 | 48.5 | 31.9 | 34.8 | 34.2 | 25.7 | 20.9 | 24.8 | 21.4 | 50.7 | 97.5 | 64.6 | 53.6 | 54 | 41.1 | 35.2 | 44.1 | -- |
| 253 |  Nang Lae, Thailand | 42.7 | 21.7 | 46.7 | 106.7 | 116.3 | 25.3 | 7.1 | -- | 6 | 4.9 | 5.4 | -- | -- | 17.5 | -- | -- | -- | -- | -- |
| 254 | Linyi, China | 42.6 | 72.7 | 56.6 | 59.8 | 40.2 | 30.9 | 21.6 | 16.9 | 17.5 | 26.3 | 42.5 | 50.3 | 72.5 | 39.1 | 44.7 | 48.4 | 57.7 | 50.2 | 56.4 |
| 255 | Nanding, China | 42.6 | 76.2 | 62.8 | 51.7 | 40.5 | 29.1 | 20.7 | 20.9 | 24.8 | 36.3 | 37.2 | 40.1 | 68.1 | 41.5 | 41.5 | -- | -- | -- | -- |
| 256 | Taian, China | 42.6 | 75.9 | 61.6 | 56.7 | 43.8 | 28.4 | 21.3 | 17.4 | 20.9 | 29.3 | 41.6 | 43.1 | 68.7 | 39.2 | 44.1 | 51.2 | 57.6 | 51.7 | 57.5 |
| 257 | Ambala, India | 42.6 | 63.4 | 47.8 | 35.3 | 26 | 45.2 | 24.8 | 21.3 | 21.8 | 31.9 | 55.4 | 78.2 | 59.1 | 67.1 | 65.3 | 58 | 63 | -- | -- |
| 258 |  Cairo, Egypt | 42.4 | 77.2 | 45.9 | 49.6 | 33.6 | 37.3 | 32.1 | 34.5 | 25.6 | 28.1 | 38.3 | 44.7 | 60.7 | 47.4 | -- | -- | -- | -- | -- |
| 259 | Kalyan, India | 42.4 | 73.3 | 73.5 | 62.3 | 41.2 | 24.6 | 18.6 | 31.7 | 8.5 | 17.4 | 36 | 45.7 | 55.8 | 48.5 | 55.7 | 47.1 | -- | -- | -- |
| 260 |  Islamabad, Pakistan | 42.4 | 70.4 | 47.5 | 32.4 | 21.2 | 21.5 | 27.8 | 23.3 | 31.9 | 31.4 | 41.2 | 66.7 | 93.6 | 40.6 | 41.1 | 39 | 35.2 | 38.6 | 39.2 |
| 261 | Indore, India | 42.3 | 36.6 | 33.5 | 25.3 | 23.1 | 22.1 | 27.4 | 27.9 | 30.8 | 32.6 | 63.6 | 102 | 80.5 | 39.4 | 45.5 | 40 | -- | -- | -- |
| 262 | Lanzhou, China | 42.2 | 64.9 | 54 | 52.4 | 55.2 | 35.3 | 27.5 | 22.7 | 25.3 | 27.5 | 34.4 | 48.1 | 58.4 | 35.1 | 37.1 | 33 | 35.7 | 45.9 | 48.6 |
| 263 | Suizhou, China | 42.2 | 97.7 | 60 | 53.3 | 39 | 30.2 | 21.8 | 18.4 | 22.5 | 20.3 | 39.7 | 43.8 | 56.2 | 35 | 36.9 | 37 | 41.9 | 44 | 50.5 |
| 264 | Baoji, China | 42.2 | 79.5 | 85.3 | 51.4 | 52.7 | 24.3 | 16.8 | 18.1 | 19 | 24.3 | 26.7 | 46 | 70.2 | 42.2 | 38 | 43.8 | 49.8 | 49.9 | 54.8 |
| 265 | Taiyuan, China | 42.2 | 52.5 | 74.3 | 53.9 | 50.7 | 33 | 23.7 | 22.2 | 25.4 | 33.3 | 41.1 | 36.9 | 59.3 | 43.9 | 46.3 | 52.1 | 53.4 | 55.9 | 63.7 |
| 266 | Suqian, China | 42 | 68.9 | 50.8 | 58.1 | 40 | 32.4 | 27.7 | 21.1 | 22.3 | 28.6 | 38.9 | 48.9 | 63.4 | 37.8 | 39.2 | 45.9 | 47.9 | 53.1 | 56.9 |
| 267 | Zhoucun, China | 42 | 83.8 | 59.1 | 45.8 | 33.2 | 30.7 | 21.1 | 18.1 | 21.4 | 34.1 | 41 | 43.2 | 69.6 | 42.2 | 43.2 | -- | -- | -- | -- |
| 268 | Renqiu, China | 41.9 | 56.9 | 64.2 | 55.4 | 38.9 | 31.3 | 20.1 | 19.3 | 18.7 | 34.8 | 49.6 | 48.4 | 66.1 | 40.5 | 42.6 | -- | -- | -- | -- |
| 269 | Xinyang, China | 41.9 | 101.4 | 65.9 | 54.7 | 43.4 | 27.9 | 20.5 | 15 | 20.1 | 18.1 | 32.9 | 39.5 | 60.7 | 40.7 | 39.1 | 40.7 | 47.8 | 53.8 | 53.6 |
| 270 | Deyang, China | 41.9 | 81.3 | 63 | 42.8 | 36.9 | 30.3 | 26.2 | 23.9 | 19.2 | 21.8 | 30.7 | 47.5 | 77.5 | 35 | 37.7 | 37.1 | 39.9 | 41.1 | 51.2 |
| 271 | Fuyang, China | 41.7 | 90 | 57.8 | 59.5 | 40.3 | 25 | 17.8 | 13.2 | 20.3 | 23.8 | 40.5 | 44.6 | 67 | 41.8 | 44.7 | 50.4 | 51.9 | 54.4 | 66.9 |
| 272 | Sanmenxia, China | 41.7 | 80.5 | 85.2 | 48.4 | 47.2 | 25.3 | 20.9 | 21.2 | 22.9 | 21.5 | 25.5 | 36.7 | 66.1 | 45.4 | 42.7 | 47.5 | 56.1 | 57.5 | 60.7 |
| 273 | Urumqi, China | 41.7 | 112.2 | 125.5 | 47.7 | 19.4 | 15.1 | 15.1 | 13.3 | 13.6 | 14 | 22.1 | 36.9 | 65.4 | 43.3 | 45.4 | 51.2 | 54.5 | 59.2 | 76 |
| 274 | Jinzhong, China | 41.5 | 55.5 | 76.1 | 52.2 | 45.5 | 29 | 23.7 | 20.8 | 22.6 | 31 | 41 | 37.2 | 63.7 | 46.1 | 39.1 | 43 | 45.5 | 53.5 | 61 |
| 275 | Alwar, India | 41.5 | 64.3 | 40.1 | 32.2 | 31.8 | 31.9 | 32 | 27.5 | 25 | 25.2 | 44.5 | 83.6 | 59.3 | 41.9 | 42.9 | 41.1 | 46.4 | 52.8 | -- |
| 276 | Muragacha, India | 41.5 | 79.5 | 64.1 | 48.1 | 59.6 | 36.8 | 31.2 | 14.4 | 25 | 20.5 | 36.7 | 52.8 | 45.9 | 69.1 | -- | -- | -- | -- | -- |
| 277 | Bathinda, India | 41.4 | 29.6 | 34.1 | 27.9 | 45.4 | 48.8 | 40.9 | 17.8 | 17.1 | 20.2 | 45.2 | 112.3 | 52.3 | 29.3 | 44.9 | 41.2 | 31 | -- | -- |
| 278 | Zhumadian, China | 41.3 | 105 | 65.3 | 51.7 | 40.4 | 25.1 | 18.4 | 13.1 | 19.3 | 20.8 | 34.9 | 39.8 | 59.3 | 44 | 42.9 | 45.9 | 52.1 | 60.4 | 57.9 |
| 279 | Kaimla, India | 41.3 | 25.1 | 14.6 | 17.1 | 19.5 | 22.8 | 29 | 31.7 | 54.2 | 43.1 | 50.8 | 106.8 | 85.7 | 47.4 | 60.9 | 63.2 | 62.8 | -- | -- |
| 280 | Cangzhou Shi, China | 41.2 | 60.7 | 55.9 | 50 | 36.3 | 30.1 | 21.4 | 21.3 | 19.8 | 32.9 | 47.3 | 48.6 | 66.9 | -- | -- | -- | -- | -- | -- |
| 281 | Bozhou, China | 41 | 91.8 | 55.9 | 54.3 | 40.8 | 23.6 | 20 | 11.9 | 19.3 | 27.1 | 50.9 | 41.9 | 54.8 | 41.2 | 39.5 | 48.3 | 54 | 57.5 | 63.3 |
| 282 | Leshan, China | 41 | 78.1 | 71 | 36.2 | 30.3 | 29.8 | 22.4 | 21.4 | 19.5 | 26.5 | 29.2 | 46.7 | 79.1 | 40.1 | 38.6 | 35.8 | 42 | 45.7 | 55.4 |
| 283 | Bara Bazar, India | 41 | 79.1 | 50.2 | 36.7 | 31.8 | 27.5 | 22.1 | 13 | 14.4 | 15.8 | 56.5 | 90.5 | 88.5 | 59.2 | -- | -- | -- | -- | -- |
| 284 |  Kathmandu, Nepal | 41 | 67.9 | 60.4 | 66 | 77 | 40.6 | 26.7 | 14 | 15.3 | 17.2 | 23.1 | 34.5 | 51 | 40.7 | 50.9 | 39.2 | 48 | 54.4 | 45.9 |
| 285 | Mae Kon, Thailand | 40.9 | 39.8 | 72.9 | 123.4 | 128.2 | 31 | 11.6 | 6 | 9.2 | 7.9 | 9.2 | 22 | 27.3 | -- | -- | -- | -- | -- | -- |
| 286 |  Kinshasa, Democratic Republic of the Congo | 40.8 | 12.6 | 20 | 24.6 | 53.3 | 83.9 | 92.4 | 63.4 | -- | -- | 34.8 | 16.1 | 30.6 | 15.5 | 44.6 | -- | 32.1 | -- | -- |
| 287 | Salodi, India | 40.8 | 53.8 | 36.8 | 25.6 | 32 | 28.3 | 24.7 | 22.2 | 30.3 | 27 | 47.9 | 91.8 | 65.2 | 48 | -- | -- | -- | -- | -- |
| 288 | Guangan, China | 40.7 | 92.1 | 62.7 | 38 | 35.1 | 29.3 | 21.8 | 19.7 | 22.4 | 24.4 | 24 | 42.8 | 73.8 | 34.3 | 34 | 31.1 | 32.7 | -- | -- |
| 289 | Yanamalakuduru, India | 40.7 | 100.8 | 74.7 | 70.3 | 84.7 | 35.6 | 22 | 14.2 | 23 | 19.5 | 23.7 | 31.7 | 43.1 | -- | -- | -- | -- | -- | -- |
| 290 | Hosur, India | 40.7 | 49.9 | 72.2 | 56.3 | 55 | 37.3 | 28.1 | 20.1 | 32.1 | 19.5 | 46 | 32.9 | 33.7 | 36.7 | 28.2 | -- | -- | -- | -- |
| 291 | Huanggang, China | 40.4 | 74.8 | 57.7 | 47.4 | 32.3 | 27.3 | 20 | 18.1 | 25.7 | 23.5 | 52.6 | 44 | 58.9 | 33.2 | 33 | 35.8 | 41 | 40.8 | 48.9 |
| 292 | Changde, China | 40.4 | 108.8 | 63.6 | 38.2 | 33.9 | 27.4 | 19.2 | 15 | 25.4 | 23.2 | 33.1 | 38.6 | 60.5 | 39 | 40 | 40.7 | 47.5 | 42.3 | 51.5 |
| 293 | Neijiang, China | 40.4 | 81.5 | 70.7 | 41.6 | 30.5 | 32.2 | 21.4 | 17.8 | 19.6 | 25.6 | 30.2 | 44.4 | 67.8 | 31.7 | 35.9 | 34.1 | 35.2 | 36.8 | 47.6 |
| 294 | Imphal, India | 40.4 | 59 | 53.9 | 60.1 | 33.5 | 29.5 | -- | -- | -- | 5.3 | 21.3 | 30.6 | 34.2 | -- | -- | -- | -- | -- | -- |
| 295 | Jodhpur, India | 40.4 | 67.5 | 75.4 | 40.1 | 30.5 | 26.9 | 18.9 | 16.6 | 19.8 | 17.4 | 32.2 | 79.7 | 64.3 | 63 | 67.8 | 67.1 | 77.2 | 113.4 | 81.9 |
| 296 | Ghandinagar, India | 40.3 | 52.4 | 61.5 | 43.1 | 47 | 31.5 | 27.4 | 26.6 | 28.8 | 27.5 | 47.5 | 52 | 40.8 | 44.6 | 45.5 | -- | -- | -- | -- |
| 297 | Buhe, China | 40.2 | -- | -- | 58.5 | 45.7 | 36.4 | 26.3 | 22 | 30.9 | 29.3 | 43.8 | 54.8 | 65.4 | -- | -- | -- | -- | -- | -- |
| 298 | Yangquan, China | 40.2 | 49.9 | 76.5 | 53.6 | 46.5 | 29.8 | 23 | 21.6 | 25.3 | 34.4 | 36.6 | 35.2 | 51 | 42 | 45.9 | 46.3 | 50.6 | 59 | 63.6 |
| 299 | Jinchang, China | 40.1 | 75.8 | 50.2 | 47.2 | 42.4 | 28.2 | 22 | 19.6 | 21.1 | 21.9 | 40.9 | 42.2 | 68.2 | 38.4 | 31 | 21.2 | 20.8 | 25.2 | 27.1 |
| 300 | Hangu, China | 40.1 | 52.4 | 57.1 | 66.3 | 39.8 | 31.1 | 24.5 | 25.4 | 22.8 | 31.1 | 41.2 | 36.2 | 51.2 | 35.5 | 36.5 | -- | -- | -- | -- |
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