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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Bhiwadi, India | 106.2 | 145.8 | 129.8 | 120.2 | 125.7 | 86.5 | 95.9 | 55.6 | 55.4 | 37.1 | 91.1 | 188.6 | 136.6 | 95.5 | 83.4 | 125.4 | - |
| 2 | Ghaziabad, India | 102 | 199.9 | 172.2 | 97.8 | 86.3 | 52.9 | 47.2 | 35.3 | 37.6 | 30.8 | 89.7 | 218.3 | 163 | 106.6 | 110.2 | 135.2 | 144.6 |
| 3 |  Hotan, China | 101.5 | - | - | 158 | 91.1 | 167.4 | 57.4 | 70.9 | 93.2 | 79.3 | 126.1 | 111.5 | 62.6 | 110.2 | 110.1 | 116 | 91.9 |
| 4 | Delhi, India | 96.4 | 183.7 | 142.2 | 80.5 | 72.9 | 47.4 | 47.1 | 35.6 | 36.9 | 30.2 | 73.7 | 224.1 | 186.4 | 84.1 | 98.6 | 113.5 | 108.2 |
| 5 | Jaunpur, India | 95.3 | 182.2 | 143.5 | 91 | 70 | 51.1 | 40.7 | 33.5 | 34.2 | 36.8 | 75.7 | 196 | 195.7 | - | - | - | - |
| 6 |  Faisalabad, Pakistan | 94.2 | 207.1 | 118 | 71.2 | 44.6 | 51.2 | 44.7 | 50.4 | 50 | 51.9 | - | 234.5 | 241.7 | 73.2 | 104.6 | 130.4 | - |
| 7 | Noida, India | 91.4 | 185.3 | 143.4 | 80.5 | 68.2 | 48 | 43.8 | 33.9 | 35 | 26.5 | 76.9 | 204.4 | 154.8 | 94.3 | 97.7 | 123.6 | 134 |
| 8 | Bahawalpur, Pakistan | 91 | 173.9 | 145.1 | 77.3 | 51.4 | 45.2 | 54.4 | 42.2 | 43.7 | 38.2 | 67.2 | 197 | 221.2 | 78.7 | - | - | - |
| 9 | Peshawar, Pakistan | 89.6 | 103.9 | 137.2 | 59.6 | 48 | 49.2 | 68.5 | 54.3 | 55.8 | 60.8 | 77.5 | 182.3 | 176.9 | - | 63.9 | - | - |
| 10 | Bagpat, India | 89.1 | 146.1 | 106.3 | 88.3 | 87.1 | 65.7 | 53.9 | 32.8 | 31.5 | 24.3 | 84.7 | 213.6 | 128.1 | - | 88.6 | - | - |
| 11 | Hisar, India | 89 | 114.6 | 111.5 | 90.7 | 67.4 | 62 | 62.2 | 44 | 40.7 | 36.8 | 74.7 | 205.5 | 157.4 | 81.1 | 81 | - | - |
| 12 | Faridabad, India | 88.9 | 128 | 109.3 | 88.8 | 76.3 | 58.4 | 57.2 | 40.8 | 38.7 | 30.2 | 82.2 | 202.7 | 163.5 | 83.3 | 85 | 129.1 | 123 |
| 13 | Greater Noida, India | 87.5 | 185.9 | 111.4 | 69 | 60.2 | 48 | 53.1 | 49.4 | 50.1 | 36 | 78.4 | 191.3 | 160.4 | 89.5 | 91.3 | - | - |
| 14 | Rohtak, India | 86.9 | 147.3 | 109.4 | 80.5 | 64 | 47.6 | 46.6 | 48.8 | 43.5 | 40.8 | 76.9 | 217.5 | 139.9 | 74.4 | 59.7 | 81.6 | 96.7 |
| 15 | Lahore, Pakistan | 86.5 | 140.6 | 135.1 | 55.8 | 38.7 | 33.8 | 27.9 | 25 | 36.5 | 45.6 | 85.1 | 205.4 | 212.1 | 79.2 | 89.5 | 114.9 | 133.2 |
| 16 | Lucknow, India | 86 | 158.5 | 118.5 | 93.5 | 76.3 | 45.3 | 37.7 | 33.6 | 29 | 25.8 | 65.6 | 195.4 | 155.1 | 86.2 | 90.3 | 115.7 | 119.2 |
| 17 | Jind, India | 84.1 | 109.8 | 57.4 | 74.6 | 77.2 | 55.1 | 53.1 | 50.4 | 43.2 | 28.4 | 80.6 | 199.5 | 146.3 | 81.6 | 85.4 | 91.6 | 126.5 |
| 18 | Gurugram, India | 83.4 | 132.2 | 116.4 | 78.7 | 71.2 | 50.8 | 47.8 | 37.3 | 36.4 | 32.4 | 67.9 | 181.8 | 151.7 | 75.3 | 93.1 | 135.8 | 145.6 |
| 19 | Kashgar, China | 83.2 | 93.1 | 100.5 | 123.4 | 60.4 | 89.8 | 18.1 | 26.7 | 46.4 | 64.6 | 99.5 | 147.1 | 116.6 | 81 | 87.1 | 95.7 | 97.5 |
| 20 | Kanpur, India | 83.2 | 185.8 | 90.8 | 77 | 58.7 | 40.1 | 33 | 27.1 | 25.1 | 21.3 | 65 | 221.3 | 175.5 | 89.1 | 48.5 | 88.2 | 119.2 |
| 21 | Muzaffarpur, India | 82.9 | 202.5 | 121.1 | 118.1 | 88.9 | 39.1 | 32.5 | 26.9 | 22.9 | 24.9 | 59.5 | 150.9 | 145.2 | 74.3 | 81.2 | 110.3 | 107.4 |
| 22 | Varanasi, India | 82.6 | 184.1 | 124.7 | 79.6 | 60.1 | 43.8 | 35.7 | 26.8 | 24.3 | 23.6 | 41.3 | 158.6 | 191.1 | - | - | - | - |
| 23 | Sahiwal, Pakistan | 81.7 | 83.7 | 116.2 | 83.1 | 58.4 | 50.1 | 50.3 | 53.9 | 62.9 | 71 | 104.4 | 275 | - | - | - | - | - |
| 24 | Bulandshahr, India | 80.8 | 176.7 | 102.4 | 94.7 | 73.2 | 48 | 42.2 | 31.9 | 31.4 | 24.2 | 82.6 | 157 | 146.9 | 98.4 | 89.4 | - | - |
| 25 | Meerut, India | 80.6 | 143.7 | 140.9 | 88.9 | 66 | 44.5 | 35.5 | 24.8 | 23.1 | 14.7 | 70.1 | 183.4 | 136.9 | 82.3 | - | - | - |
| 26 | Kadaura, India | 80.3 | 170.1 | 110.6 | 63 | 43.8 | 43.2 | 37.4 | 31.7 | 32.9 | 33 | 64.5 | 180.3 | 159 | - | - | - | - |
| 27 | Patna, India | 78.2 | 131.3 | 123 | 93.3 | 75.2 | 41.1 | 31.5 | 23 | 25.5 | 31.5 | 54.9 | 148.8 | 162 | 68.4 | 82.1 | 119.7 | 118.5 |
| 28 |  Dhaka, Bangladesh | 78.1 | 188.6 | 157.9 | 118.7 | 65.1 | 41 | 34.5 | 20.2 | 27.6 | 29 | 56.5 | 97.5 | 105.3 | 77.1 | 83.3 | 97.1 | 79.7 |
| 29 |  N'Djamena, Chad | 77.6 | 93 | 198.6 | 160 | 103 | 61.1 | 40.5 | 18.3 | 15.4 | 21.5 | 44.6 | 59.6 | 146.2 | - | - | - | - |
| 30 | Dharuhera, India | 76.9 | 117.6 | 90.8 | 81.7 | 75 | 55.7 | 54.7 | 45.3 | 41.5 | 31.2 | 67.8 | 144.2 | 121.6 | 72.5 | - | - | - |
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