World's most polluted cities (historical data 2017-2021)
Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)
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2021
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2021 Report - English
2021 World air quality report
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Meets WHO guideline
Exceeds by 1 to 2 times
Exceeds by 2 to 3 times
Exceeds by 3 to 5 times
Exceeds by 5 to 7 times
Exceeds by 7 to 10 times
Exceeds by over 10 times
Rank  | City | 2021 | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 51 |  Siddharthanagar, Nepal | 64.7 | 149.6 | 151.7 | 80.7 | 85 | 32.4 | 23.5 | 18.8 | 21 | 22.7 | - | - | 81.8 | - | - | - | - |
| 52 |  Fatehabad, India | 63.3 | 92 | 62.4 | 57.2 | 45.9 | 48 | 47.2 | 35.7 | 32.8 | 17.9 | 52.6 | 137.3 | 94.2 | 78.5 | - | - | - |
| 53 | Bewar, India | 61.4 | 128.2 | 68.8 | 43.6 | 32.2 | 34.8 | 29.8 | 26.2 | 28.3 | 26.6 | 55.8 | 141.8 | 112.6 | - | - | - | - |
| 54 | Kaimla, India | 60.9 | - | 69.7 | 67.6 | 50.1 | 49.8 | 50 | 34.1 | 40 | 27.2 | 71.1 | 106.8 | 100.9 | 63.2 | 62.8 | - | - |
| 55 |  Osh, Kyrgyzstan | 60.9 | 179.5 | 142.6 | 87.9 | 37.9 | 18.4 | 16.5 | 24.5 | 25.4 | 25.7 | 49 | 68.9 | 108.7 | - | - | - | - |
| 56 | Kutail, India | 59.9 | 75.3 | 85.7 | 65.7 | 48 | 36 | 42.5 | 42.1 | 33.2 | 26.6 | 72.1 | 111.3 | 84.9 | 61.9 | 80.4 | - | - |
| 57 | Narnaul, India | 59.7 | 102.3 | 73 | 65.6 | 65.4 | 46.7 | 40.9 | 38 | 35.9 | 32.6 | 43.6 | 107.2 | 94.7 | 49.2 | - | - | - |
| 58 | Asansol, India | 59.7 | 117.6 | 75.6 | 81.3 | 56.6 | 36.8 | 29.4 | 24.9 | 32.5 | 25.8 | 57.6 | 79.9 | 89.1 | 55.3 | 50.9 | 64.4 | - |
| 59 |  Dushanbe, Tajikistan | 59.5 | 82.1 | 48 | 36.9 | 31.3 | 41.2 | 45 | 64.8 | 53.6 | 88.1 | 70 | 96.5 | 62.1 | 30.9 | - | - | - |
| 60 | Kolkata, India | 59 | 124.3 | 103.6 | 72.8 | 44.2 | 28.4 | 29.7 | 24 | 27.6 | 19.6 | 49.8 | 81.6 | 104.7 | 46.6 | 59.8 | 85.4 | 76.7 |
| 61 | Khujand, Tajikistan | 59 | 45 | 52.4 | 53 | 39.1 | 32 | 26.5 | 34.8 | 33.4 | 37.9 | 63.3 | 127.3 | 145.1 | - | - | - | - |
| 62 | Fatehgarh Sahib, India | 58.4 | 66.6 | 70.3 | 60.1 | 58.4 | 50.2 | 42.5 | 33.2 | 45.5 | 28.2 | 64.5 | 96.7 | 98.1 | 64.8 | 44.4 | - | - |
| 63 | Jalandhar, India | 58.3 | 55.9 | 54.4 | 49.1 | 40 | 52.4 | 43.3 | 40.7 | 39.4 | 36.5 | 71.1 | 126.2 | 87.8 | 52.2 | 41 | 56.4 | - |
| 64 | Hapur, India | 58.2 | 40.3 | 48.3 | 41.3 | 28.4 | 16.2 | 16.2 | 12.6 | 38 | 24.4 | 85.3 | 163.2 | 153.4 | 44.2 | - | - | - |
| 65 | Hajipur, India | 58.1 | 83.6 | 81.9 | 91.4 | 86.7 | 38.2 | 32.4 | 26.8 | 25.1 | 23.4 | 41.4 | 92.1 | 80.8 | 54 | - | - | - |
| 66 | Howrah, India | 58 | 128.9 | 118.7 | 76.8 | 43.3 | 22.6 | 23 | 21.2 | 24.8 | 19.6 | 43.3 | 84.4 | 120.8 | 53.7 | 55.9 | 64.2 | - |
| 67 | Kaithal, India | 57.8 | 72.9 | 59 | 33.8 | 31.4 | 37.9 | 40.7 | 38.3 | 34.9 | 24.5 | 61.2 | 139.4 | 109.3 | 54.3 | 50 | - | - |
| 68 | Sirsa, India | 57.8 | 59.5 | 64.9 | 53.6 | 45.5 | 51.8 | 60.4 | 40 | 35.4 | 18.2 | 50.6 | 120.2 | 81.8 | 47.2 | 73.7 | - | - |
| 69 | Kota, India | 57 | 82.5 | 66.4 | 66.6 | 59.8 | 43.3 | 37.5 | 28.7 | 35.5 | 28.1 | 49.5 | 101 | 93.2 | 42.1 | 49.1 | 52.7 | - |
| 70 | Jaipur, India | 56.6 | 69.6 | 61.1 | 62 | 63.6 | 42.9 | 47.6 | 36 | 34.7 | 22.6 | 53.8 | 103 | 83.4 | 43.8 | 50.5 | 67.6 | 88.3 |
| 71 | Navi Mumbai, India | 56 | 134.3 | 81.8 | 80.3 | 50.3 | 31.6 | 21.5 | 16.2 | 19.8 | 19.1 | 45.1 | 71.9 | 91.8 | 52.6 | 61.6 | - | - |
| 72 | Pali, India | 55.9 | 64.3 | 65.3 | 79.6 | 73 | 50.7 | 54.2 | 39 | 36.1 | 35.4 | 43.4 | 68.1 | 61.5 | 46.4 | 54.6 | 82.3 | - |
| 73 |  Shihezi, China | 55.7 | 164 | 130.3 | 48 | 19.5 | 24 | 16.5 | 15.8 | 16.4 | 19.4 | 31.3 | 54.4 | 121.6 | 57.5 | 63.3 | 61.3 | 60.6 |
| 74 | Linfen, China | 55.5 | 79 | 82.6 | 75.9 | 51.7 | 43.9 | 37.5 | 28.9 | 34.3 | 39 | 52.2 | 66.2 | 69.8 | 52.5 | 61.7 | 68.2 | 80.6 |
| 75 | Gourela, India | 55.4 | 88.3 | 68.9 | 61.7 | 49.7 | 41.1 | 37 | 36.6 | 42.7 | 32.1 | 48.2 | 84.3 | 76.1 | 39.3 | 43.4 | - | - |
| 76 | Ahmedabad, India | 55.1 | 76.5 | 79.3 | 85.6 | 71 | 43.2 | 41.2 | 33.5 | 34.1 | 25.3 | 49 | 63.4 | 60.6 | 49 | 59 | 76.1 | - |
| 77 | Amritsar, India | 55 | 53.2 | 64 | 45.8 | 44.5 | 47.5 | 42.6 | 39.6 | 43.2 | 47.2 | 71.4 | 91.1 | 77.1 | 47.1 | 47.2 | 60.6 | - |
| 78 | Patiala, India | 54 | 64.5 | 52.7 | 45 | 45.2 | 44.7 | 38.6 | 31.1 | 30.4 | 26.9 | 62.5 | 107.9 | 86.8 | 41.1 | 35.2 | 44.1 | - |
| 79 |  Muscat, Oman | 53.9 | 27.1 | 37.1 | 60.7 | 52.1 | 42.1 | 96.8 | 105.3 | 78.7 | 52.7 | 39.4 | 40.8 | 26 | - | - | - | - |
| 80 | Bhiwani, India | 53.8 | 39.8 | 31 | 24.6 | 22.3 | 22.7 | 25.5 | 37.2 | 35.2 | 33.2 | 65.9 | 144 | 110 | 39 | 61.6 | - | - |
| 81 | Guwahati, India | 53.1 | 125.1 | 148.9 | 105.3 | 54.6 | 25.4 | 18.1 | 14.5 | 18.4 | 21.1 | 38.6 | 70 | 96.6 | 62.1 | - | - | - |
| 82 | Puyang, China | 52.8 | 100.9 | 67.8 | 68.9 | 44 | 37.8 | 31.1 | 21.1 | 29.3 | 24.1 | 62.6 | 77.4 | 66.5 | 59.3 | 63.4 | 63.5 | 68.8 |
| 83 | Katni, India | 52.2 | 110.6 | 69 | 52.6 | 55.3 | 24.5 | 28.3 | 20.7 | 25.6 | 18.7 | 47.9 | 111 | 95 | 57.6 | - | - | - |
| 84 |  Lampang, Thailand | 52.2 | 113.7 | 131.7 | 149.5 | 101 | 13.3 | 6 | 6.4 | 7.9 | 7.3 | 13.2 | 22.7 | 45.9 | 31.6 | 33.1 | 23.3 | 19.5 |
| 85 | Gwalior, India | 52 | 123.2 | 80.5 | 53.9 | 42.9 | 26 | 25.5 | 19.8 | 21.5 | 19.9 | 42.9 | 102.8 | 108.5 | 61.1 | - | - | - |
| 86 |  Port Harcourt, Nigeria | 51.6 | 38.5 | 67.1 | 54.7 | 42.7 | 33.2 | 38.7 | 41 | 66.4 | 46.3 | 58.5 | 49.6 | 78.1 | - | - | - | - |
| 87 | Hebi, China | 51.4 | 84.6 | 72.2 | 72.7 | 48.6 | 39.5 | 34 | 21 | 31.6 | 29.9 | 53.7 | 69.7 | 59.9 | 58.9 | 62.1 | 55.8 | 64.4 |
| 88 |  Rawalpindi, Pakistan | 51.4 | 104.6 | 91.4 | 37.7 | 20.9 | 22.5 | 26.1 | 31.1 | 37.7 | 37.4 | 33.1 | 73.3 | 91.7 | 42.4 | 40.8 | - | - |
| 89 | Aksu, China | 51.2 | 61.3 | 67 | 87.4 | 44.7 | 42.5 | 21 | 18.1 | 22.2 | 31.6 | 46.3 | 88.2 | 76.1 | 58.4 | 54 | 74.1 | 69.8 |
| 90 | Mandikhera, India | 50.9 | 72.7 | 76.4 | 49.7 | 49.6 | 30.3 | 40.8 | 27.2 | 30.1 | 23.3 | 53.1 | 103.4 | 61.5 | 51.7 | - | - | - |
| 91 | Kathmandu, Nepal | 50.9 | 103.5 | 79.1 | 108.6 | 89.1 | 30.2 | 22.1 | 15.6 | 14.7 | 18.2 | 26.1 | 46.6 | 59.8 | 39.2 | 48 | 54.4 | 45.9 |
| 92 | Anyang, China | 50.8 | 89.6 | 80.1 | 72.7 | 47.1 | 38.5 | 29.4 | 20.3 | 27 | 24.7 | 52.1 | 71.1 | 58.9 | 61.5 | 70.3 | 72.9 | 81.1 |
| 93 | Xiangyang, China | 50.6 | 94.4 | 69.1 | 53.9 | 44.8 | 41.2 | 31.3 | 23.3 | 22.3 | 25.7 | 45.4 | 70.6 | 77.7 | 52.5 | 60.4 | 60.5 | 64.4 |
| 94 |  Manama, Bahrain | 49.8 | 47.2 | 34.8 | 43 | 86.5 | 45 | 64.9 | 50.4 | 54.9 | 45.9 | 42.5 | 46.6 | 35.6 | 39.7 | 46.8 | 59.8 | 62.5 |
| 95 | Changji, China | 49.8 | 154.3 | 122.6 | 49 | 18.8 | 22.5 | 11.8 | 13.3 | 14 | 18.8 | 27.4 | 48.5 | 101.3 | 53.5 | 48.2 | 55 | 57.6 |
| 96 |  Krasnoyarsk, Russia | 49.8 | 52.4 | 68.9 | 18.2 | 21.1 | 36.7 | 32.7 | 42.8 | 148.4 | 45.3 | 48.3 | 29.4 | 53.2 | 14.7 | 17.7 | 23.1 | 16.4 |
| 97 | Luohe, China | 49.7 | 104.8 | 68.5 | 55.5 | 42 | 33.8 | 29.8 | 18.8 | 22.8 | 22.7 | 58.4 | 66.2 | 74 | 55.4 | 60 | 62.6 | 63.7 |
| 98 | Khanna, India | 49.7 | 52.9 | 50.6 | 51.2 | 36.7 | 42.4 | 36.2 | 27.3 | 27.3 | 28.1 | 64 | 93.9 | 81.1 | 42.6 | 36.1 | 41.6 | - |
| 99 |  Baghdad, Iraq | 49.7 | 59.8 | 53.6 | 35.5 | 38 | 51.1 | 38.9 | 41.4 | 51.2 | 53 | 55.8 | 58.4 | 62.8 | - | 39.6 | - | - |
| 100 | Turpan, China | 49.6 | 79.4 | 79.6 | 50 | 31.6 | 58.7 | 19.7 | 23 | 19.3 | 28.3 | 34.6 | 71.7 | 92.1 | 49.5 | 56.3 | 56.1 | 66.1 |
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