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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 169 |  Cupar, United Kingdom | 5.7 | 6.1 | 7.3 | 5.7 | 9.7 | 8.1 | 6.7 | 3.9 | 3.7 | 4.8 | 4.5 | 4.2 | 3.7 | 7.1 | 6.4 | 5.8 | 7.6 | -- | -- |
| 168 | Whaley Bridge, United Kingdom | 5.8 | 4.2 | 8.2 | 3.2 | 11.6 | 7.2 | 8.6 | 2.7 | 3.2 | 8.5 | 4.6 | 4 | 2.8 | -- | -- | -- | -- | -- | -- |
| 167 | Helsby, United Kingdom | 5.8 | 6.5 | 7.2 | 4.6 | 6.6 | 5.1 | 6.7 | 3.6 | 3.6 | 7 | 5.2 | 6 | 6.3 | 7.2 | 7.1 | 7 | -- | -- | -- |
| 166 | Colchester, United Kingdom | 5.8 | 6.6 | 10.2 | 5.6 | 9.3 | 5.5 | 5.5 | 2.8 | 3 | 7.2 | 4.2 | 4.9 | 4.9 | 6.6 | 7.2 | 7.1 | 9.3 | 10 | -- |
| 165 | Gateshead, United Kingdom | 5.9 | 7 | 7.5 | 5.7 | 7.2 | 6.7 | 6.5 | 4.4 | 4.4 | 6.1 | 5 | 5.3 | 5.7 | 6.9 | 6.4 | 6.6 | 7.1 | 7.3 | 7.6 |
| 164 | Irvine, United Kingdom | 6 | 5.9 | 7.7 | 5.1 | 8.6 | 7.1 | 7.8 | 4.3 | 4 | 6.8 | 4.8 | 4.4 | 5.8 | 6.7 | 6.1 | 6.2 | 8.1 | -- | -- |
| 163 | Birkenhead, United Kingdom | 6 | 7.5 | 8 | 5.2 | 7.8 | 6.9 | 7.9 | 3.6 | 3.4 | 8 | -- | -- | 4.5 | 7.5 | 7.1 | 7.2 | 8.5 | 8.3 | 7.3 |
| 162 | Speke, United Kingdom | 6.1 | 4.3 | 3.1 | 3.4 | 8.7 | 9.1 | 7.6 | 5.5 | 5.6 | 11 | 4.7 | 5.5 | 5.8 | 6.2 | 5.4 | -- | 9.7 | 8.8 | 8.9 |
| 161 | Sandy, United Kingdom | 6.1 | 9.2 | 9.4 | 5 | 8.1 | 4.9 | 7.1 | 3.4 | 3.3 | 7.4 | 6 | 6 | 4.6 | 9 | 8.6 | 11.5 | 10.7 | 13.8 | 12.4 |
| 160 | Leigh, United Kingdom | 6.1 | 8.1 | 9.3 | 4.6 | 6.9 | 5.8 | 5.8 | 3.1 | 2.8 | 6.3 | 4.9 | 8.4 | 7.1 | 9.8 | 9.8 | -- | -- | -- | -- |
| 159 | Hollinswood, United Kingdom | 6.1 | 6.7 | 8.4 | 5.2 | 8.6 | 6.7 | 7.6 | 3.7 | 3.3 | 7.4 | 5.2 | 5.3 | 5.3 | -- | -- | -- | -- | -- | -- |
| 158 | Wrexham, United Kingdom | 6.2 | 7 | 7.6 | 5.6 | 9 | 6.8 | 8.1 | 3.4 | 3.3 | 7.2 | 5.9 | 5.4 | 5.3 | 7.9 | 8.1 | 7.7 | 8 | -- | -- |
| 157 | Milton Keynes, United Kingdom | 6.2 | -- | -- | -- | 11.8 | 7.3 | 7.8 | 4 | 4 | 8 | 5.7 | 6.1 | 5.2 | 11.3 | 11.1 | -- | -- | -- | -- |
| 156 | Honiton, United Kingdom | 6.2 | 7.6 | 8.1 | 6.3 | 7.8 | 6.8 | 8.5 | 4.2 | 3.9 | 6.2 | 4.9 | 5.3 | 5.8 | 5.5 | -- | -- | -- | -- | -- |
| 155 | Crewe, United Kingdom | 6.2 | 7.5 | 7 | 5.2 | 8.9 | 7.3 | 8.1 | 3.7 | 3.6 | 8.5 | -- | -- | 3.6 | 6.9 | -- | -- | -- | -- | -- |
| 154 | Saltash, United Kingdom | 6.3 | 7.1 | 7 | 6.2 | 6.7 | 5.4 | 7.2 | 5.9 | 4.4 | 8.8 | 5.8 | 5 | 5.6 | 6.1 | 6.4 | 8.1 | 9.7 | 8.4 | 7.8 |
| 153 | Heald Green, United Kingdom | 6.3 | 7.3 | 8.7 | 5.1 | 7.8 | 7.1 | 8 | 3.9 | 3.8 | 7.6 | 5.2 | 6.3 | 5.8 | -- | -- | -- | -- | -- | -- |
| 152 | Charlton Mackrell, United Kingdom | 6.3 | 8.5 | 8.5 | 6 | 7.7 | 6.2 | 7.5 | 3.9 | 3.7 | 2.4 | -- | -- | 4.2 | 5.8 | -- | -- | -- | -- | -- |
| 151 | Johnstone, United Kingdom | 6.4 | 4.4 | 7 | 6.5 | 9.8 | 8.4 | 9.1 | 4.6 | 4.5 | 7.6 | 5.6 | 5.6 | 4.9 | 6.1 | 6.8 | -- | -- | -- | -- |
| 150 | Leeds, United Kingdom | 6.4 | 7 | 9.2 | 5.2 | 11.9 | 6.9 | 7.4 | 3.1 | 3.1 | 9.2 | 4.6 | 5.3 | 5 | 9 | 8.6 | 8.5 | 12.3 | 11.5 | 10 |
| 149 | Newcastle upon Tyne, United Kingdom | 6.5 | 5.3 | 7.5 | 6.5 | 10 | 7.8 | 7.7 | 4.9 | 4.4 | 7.3 | 5.7 | 5.6 | 5.8 | 7.5 | 8.6 | 7.7 | 10.2 | 9 | 7.3 |
| 148 | Hatfield, United Kingdom | 6.5 | 4.2 | 7.9 | 6 | 8.4 | 7.8 | 8.5 | 4.8 | 4.5 | 8.2 | 6.3 | 6.9 | 5.5 | 9.7 | 9.7 | 9.3 | 9.5 | 11.2 | 12.4 |
| 147 | Glazebury, United Kingdom | 6.5 | 8 | 8.8 | 5 | 8.5 | 6.5 | 7.3 | 3.9 | 3.5 | 7.3 | 5.7 | 7.1 | 6.2 | 6.6 | -- | -- | -- | -- | -- |
| 146 | Dyserth, United Kingdom | 6.6 | 5.9 | 7.5 | 6.6 | 12 | 8.9 | 11.7 | 3.4 | 3.2 | 8.2 | 4.5 | 2.9 | 3.8 | -- | -- | -- | -- | -- | -- |
| 145 | Bangor, United Kingdom | 6.6 | 7.4 | 8 | 5.1 | 9.9 | 6.9 | 11.5 | 4.2 | 3.5 | 7.7 | 4.9 | 5.2 | 5.8 | 7.9 | 9.8 | 8.2 | 10.7 | -- | -- |
| 144 | Coventry, United Kingdom | 6.6 | 7.6 | 8.3 | 5.8 | 9.6 | 7.2 | 7.9 | 4 | 4 | 8.1 | 5.9 | 6 | 5.5 | 7.4 | 7.5 | 7.4 | 9.3 | 12.1 | 11.4 |
| 143 | Chilbolton, United Kingdom | 6.6 | 8.1 | 9.1 | 6 | 7.9 | 7.2 | 8.4 | 4.2 | 3.6 | 4 | -- | -- | 4.3 | 7.5 | 7.5 | 7.7 | 8.5 | 8.9 | 7.5 |
| 142 | Swindon, United Kingdom | 6.7 | 9.3 | 9.8 | 5.9 | 8.3 | 7.2 | 8.2 | 4 | 3.7 | 7.6 | 5.4 | 6.4 | 5.5 | 9.4 | 10.8 | -- | -- | -- | -- |
| 141 | Royal Leamington Spa, United Kingdom | 6.7 | 8.3 | 9.5 | 5.5 | 9.2 | 6.9 | 7.5 | 4 | 3.7 | 7.8 | 5.8 | 7 | 5.6 | 7.4 | 7 | 7.1 | 9.5 | 11 | 11 |
| 140 | High Legh, United Kingdom | 6.7 | 7.8 | 8.8 | 5.2 | 12.9 | 5.8 | 8.3 | 3.5 | 3.3 | 9.4 | 4.8 | 5.2 | 6.2 | -- | -- | -- | -- | -- | -- |
| 139 | Burwell, United Kingdom | 6.7 | 7.6 | 9.9 | 5.5 | 9.6 | 6.9 | 7.9 | 4.1 | 4 | 5 | -- | -- | 3.2 | 5.9 | -- | -- | -- | -- | -- |
| 138 | Preston, United Kingdom | 6.8 | 7.9 | 8.7 | 5.4 | 9.5 | 7.7 | 7.6 | 4.2 | 3.9 | 7.6 | 5.9 | 6.8 | 6.6 | 7.8 | 7.5 | 7.4 | 9.3 | 9.3 | 8.7 |
| 137 | Broxted, United Kingdom | 6.8 | 7.2 | 11.4 | 6.5 | 14 | 6.6 | 6.9 | 3.5 | 3.7 | 8.6 | 5.8 | 6.1 | 6 | 7.6 | -- | -- | -- | -- | -- |
| 136 | Barnsley, United Kingdom | 6.8 | -- | -- | -- | 11.2 | 7.5 | 8 | 3.7 | 3.8 | 8.7 | 6.8 | 7 | 6.8 | 8.6 | 9.7 | -- | -- | -- | -- |
| 135 | Weybridge, United Kingdom | 6.9 | 4.9 | 6.5 | 6 | 10.6 | 7.9 | 10.4 | 4.1 | 3.8 | 6.6 | 7.5 | -- | -- | 8.6 | -- | -- | -- | -- | -- |
| 134 | Huntingdon, United Kingdom | 6.9 | 8.5 | 11.8 | 6 | 9.2 | 7.1 | 7.7 | 4.2 | 4.3 | 7.9 | 5.9 | 6.5 | 5.4 | 8.8 | 8.1 | 7.8 | 7.4 | -- | -- |
| 133 | Chesterfield, United Kingdom | 6.9 | 8.2 | 9.5 | 5.9 | 9.5 | 7 | 7.7 | 3.7 | 3.7 | 8.2 | 6.3 | 6.9 | 6.8 | 7.5 | 7 | 7.3 | 9 | 9.7 | 8.8 |
| 132 | Chatham, United Kingdom | 6.9 | 7.2 | 10.9 | 6.5 | 8.8 | 7.2 | 8.8 | 4.6 | 4.5 | 4.3 | 5 | 6 | 5.6 | 8.4 | 8.9 | 10.2 | 14 | 15.2 | 14.1 |
| 131 | Borehamwood, United Kingdom | 6.9 | 8.2 | 10.6 | 5.8 | 8 | 6.9 | 8.3 | 4 | 4.5 | 8.8 | 6 | 6.5 | 5.9 | 8.2 | 10.1 | 9.6 | 9.3 | 7.1 | -- |
| 130 | Newport, United Kingdom | 7 | 8.7 | 10 | 6.9 | 7.4 | 7.2 | 9 | 5 | 4.1 | 8 | 5.8 | 6.2 | 5.8 | 7.4 | 7.1 | 7.8 | 9.7 | -- | -- |
| 129 | Belfast, United Kingdom | 7 | 9.2 | 8.5 | 6.4 | 8.4 | 7.3 | 9.8 | 4.2 | 3.8 | 7.9 | 5.7 | 8.4 | 4.9 | 8.7 | 9.3 | -- | 12.9 | 13 | 10.2 |
| 128 | Warrington, United Kingdom | 7 | 8.7 | 5.7 | 5 | 9.6 | 7.3 | 7.2 | 2.9 | 5.1 | -- | 13 | 8.5 | 7.5 | 7.2 | 8 | 8.5 | 11.4 | 9 | 9.7 |
| 127 | Pendlebury, United Kingdom | 7 | 8.4 | 9.7 | 5.2 | 11.6 | 7.6 | 8.6 | 3.2 | 3.4 | 8.1 | 5.4 | 6.5 | 6.1 | 8.7 | 10 | 9.2 | 11.1 | -- | -- |
| 126 | Leicester, United Kingdom | 7 | 8.5 | 10.5 | 6.1 | 9.4 | 7.2 | 7.1 | 4 | 4.1 | 8.3 | 6 | 7.4 | 6 | 8.5 | 7.7 | 7.5 | 11.4 | 10.5 | 10.6 |
| 125 | Immingham, United Kingdom | 7 | 7.2 | 9.9 | 5.6 | 9.8 | 8.1 | 8.5 | 4.1 | 4.1 | 9.6 | 5.9 | 6 | 5.8 | 5.9 | -- | -- | -- | -- | -- |
| 124 | Hartlepool, United Kingdom | 7 | 7.1 | 8.2 | 6 | 10.1 | 8.5 | 6.8 | 4.7 | 4.9 | 7 | 8.2 | 6 | 6.1 | 6.5 | -- | -- | -- | -- | -- |
| 123 | Dewsbury, United Kingdom | 7 | 9.2 | 9.7 | 5.4 | 9.9 | 7.9 | 7.9 | 3.9 | 4.1 | 9 | -- | -- | 4 | 7.5 | -- | -- | -- | -- | -- |
| 122 | Ruabon, United Kingdom | 7.1 | 7.3 | 8.5 | 7.4 | 11.3 | 7 | 9.8 | 3.3 | 3.2 | 7.9 | 4.8 | 6.2 | 6.6 | -- | -- | -- | -- | -- | -- |
| 121 | York, United Kingdom | 7.1 | 8.1 | 8.9 | 5.3 | 9 | 7.1 | 7.8 | 5.3 | 4.7 | 7.7 | 6.8 | 7.4 | 6.7 | 7.6 | 7 | 7.9 | 9.6 | 9.8 | 9.5 |
| 120 | Blackpool, United Kingdom | 7.1 | 9.4 | 9.9 | 6.2 | 8.3 | 7.3 | 7.5 | 4.1 | 3.9 | 8.3 | 6.1 | 6.8 | 7.8 | 9.2 | 8.3 | 8.3 | 10.3 | 8.3 | 7.6 |
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