World's most polluted cities (historical data 2017-2021)
Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)
Filter cities by
2021
NEW
World air quality report
Download PDF
2021 Report - English
2021 World air quality report
Download PDF
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2101 |  Topolníky, Slovakia | 13.4 | 13.9 | 23 | 16.8 | 11.5 | 6.6 | 13.1 | 11.2 | 7.3 | 10.4 | 15.7 | 16.8 | 14.9 | 11.6 | 14.4 | - | - |
| 2102 |  Tongyeong, South Korea | 13.4 | 15.9 | 15.6 | 19.4 | 14.1 | 16.1 | 12.5 | 8.2 | 8.2 | 9.1 | 13.2 | 17.7 | 16.1 | - | 19.4 | - | - |
| 2103 |  Ecublens, Switzerland | 13.4 | 18.1 | 20.6 | 18.2 | 13 | 5.5 | 10.3 | 10.6 | 9.7 | 11.7 | 13.9 | 16.2 | 16.9 | 11 | 11.3 | 14.8 | - |
| 2104 |  Anaheim, USA | 13.4 | 12.5 | 12.1 | 6.7 | 10.1 | 10.9 | 10.2 | 13.4 | 16.3 | 17.8 | 8.6 | 23.7 | 18.4 | 12.4 | 9.1 | 12 | 13.6 |
| 2105 | Arcadia, USA | 13.4 | 10.5 | 11.8 | 6.5 | 9.4 | 10.9 | 10.7 | 15.3 | 14.9 | 16.3 | 10.8 | 24.8 | 18.7 | 17.2 | 12.2 | - | - |
| 2106 | Carson, USA | 13.4 | 17.1 | 13.6 | 9 | 10.7 | 9.7 | 10.6 | 13.2 | 13.7 | 13.8 | 8.9 | 22.2 | 18.4 | 15.9 | - | - | - |
| 2107 | Coarsegold, USA | 13.4 | 17.3 | 12.7 | 6.9 | 5.8 | 3.3 | 4.9 | 8.8 | 29.2 | 17.5 | 24.5 | 16.7 | 11.6 | 24.5 | 6.6 | - | - |
| 2108 | Hermosa Beach, USA | 13.4 | 14.6 | 12.2 | 8 | 10.3 | 9.4 | 10.5 | 13.4 | 16.3 | 17.5 | 11.2 | 22.3 | 15.9 | 14.3 | 11.9 | - | - |
| 2109 | Huntington Beach, USA | 13.4 | 17.3 | 12.4 | 8 | 11 | 9.6 | 8.3 | 11.5 | 16 | 16.4 | 10.5 | 21.9 | 19 | - | - | - | - |
| 2110 | Imperial Beach, USA | 13.4 | 12.7 | 10.6 | 8.6 | 10.4 | 10.7 | 8.5 | 11.1 | 16.1 | 19.1 | 15.6 | 19.9 | 17.6 | - | - | - | - |
| 2111 | Miramonte, USA | 13.4 | 2.3 | 9.4 | 4.6 | 6.8 | 5.2 | 7.1 | 7.9 | 17.4 | 41.8 | 38.7 | 5.4 | 4.7 | 17.1 | - | - | - |
| 2112 | Monroe, USA | 13.4 | - | 19.2 | 14.5 | 13.9 | 12.5 | 11 | 14.8 | 15.1 | 14 | 11.6 | 12.7 | 13.3 | - | - | - | - |
| 2113 | Chicago, USA | 13.4 | 17.4 | 16.2 | 12.1 | 12.4 | 9 | 10.3 | 19.4 | 16.6 | 9.3 | 12.1 | 12.2 | 13.6 | 11.1 | 12.8 | 9.4 | 6.7 |
| 2114 | Waukegan, USA | 13.4 | 18.2 | 16.8 | 11.9 | 13.4 | 10.9 | 10.2 | 17.9 | 16.6 | 8.2 | 11.5 | 11.3 | 13.4 | - | - | - | - |
| 2115 | Wheaton, USA | 13.4 | 17.8 | 16.1 | 13.1 | 11.7 | 9.3 | 9.7 | 19.1 | 17.5 | 9.3 | 11.8 | 11.6 | 13.1 | - | 11.9 | - | - |
| 2116 | Bigfork, USA | 13.4 | 4.7 | 5.8 | 3.5 | 3.8 | 3.2 | 5.5 | 31.2 | 31.8 | 18.9 | 6.3 | 13.3 | 8.8 | - | 6.7 | - | - |
| 2117 | Hardin, USA | 13.4 | - | 12.2 | 7.4 | 4.6 | 2.9 | 4.2 | 28.1 | 27.4 | 15.6 | 10.2 | 7.7 | - | - | - | - | - |
| 2118 | Lowell, USA | 13.4 | 11.9 | 10.3 | 11.3 | 13.4 | 13.1 | 9.8 | 19 | 15.4 | 14.5 | 22.8 | - | - | 10.8 | 14.1 | - | - |
| 2119 | Broadview Heights, USA | 13.4 | - | - | - | 12.5 | 10.9 | 14.1 | 19.1 | 18 | 10.9 | 10.2 | 11.2 | 13 | - | - | - | - |
| 2120 | Jenks, USA | 13.4 | - | - | 15.2 | 13 | 10.1 | 12.7 | 16.9 | 16.2 | 11.9 | 10.6 | - | - | - | - | - | - |
| 2121 | Jacksonville, USA | 13.4 | 6.3 | 7.8 | 4.3 | 3.5 | 2.2 | 5 | 10.5 | 52.7 | 39.5 | 3.5 | 9.9 | 6.9 | 17.3 | 9.5 | - | - |
| 2122 | McKeesport, USA | 13.4 | 14.3 | 15.7 | 9.9 | 12.2 | 12.3 | 14.9 | 20.7 | 18.2 | 11.4 | 8.9 | 11.7 | 10.5 | 11.2 | 13.3 | 10 | 11.2 |
| 2123 | Coulee Dam, USA | 13.4 | 6.5 | 3.6 | 3.1 | 4.7 | 3.4 | 6.1 | 24.4 | 47.9 | 14.6 | 3.6 | 8.1 | 3.6 | 8.9 | 6.7 | - | - |
| 2124 | Delafield, USA | 13.4 | - | - | 11.8 | 11.1 | 9.4 | 10.2 | 19.6 | 19.1 | 9.3 | 12.2 | 12.8 | 17.5 | - | - | - | - |
| 2125 |  Leibnitz, Austria | 13.3 | 21 | 22.5 | 13.9 | 10.7 | 6.1 | 11.1 | 8.4 | 5.4 | 8.8 | 13.1 | 16.5 | 22.9 | 14.2 | - | - | - |
| 2126 |  Roeselare, Belgium | 13.3 | 13.5 | 15.5 | 17.8 | 15.4 | 9.7 | 13.7 | 11.5 | 8.2 | 16.3 | 11 | 14 | 13.5 | 12.1 | 13.3 | 15.3 | 14.1 |
| 2127 |  Sena Madureira, Brazil | 13.3 | 3.3 | 3.5 | 1.7 | 4.1 | 7.7 | 9.1 | 15.5 | 35.2 | 28.9 | 15.5 | 2.9 | 2.7 | 15.6 | - | - | - |
| 2128 | Piracicaba, Brazil | 13.3 | 8.6 | 8.8 | 11 | 7.4 | 15.8 | 13.7 | 18.9 | 21.2 | 23.1 | 9.8 | 8.4 | 7.8 | 13.7 | 13.4 | 13.6 | 12.5 |
| 2129 |  Qiongshan, China | 13.3 | - | - | 15.9 | 12.9 | 10.3 | 12.1 | 8.9 | 9.5 | 10.2 | 11.2 | 18.6 | 22.6 | - | - | - | - |
| 2130 |  Teplice, Czech Republic | 13.3 | 14 | 23.9 | 11.7 | 8.8 | 5.8 | 12 | 9.4 | 8.3 | 11.8 | 16.8 | 17.2 | 20.6 | 13.4 | 14.2 | 19.1 | 18.8 |
| 2131 |  Lübeck, Germany | 13.3 | 10.4 | 14.1 | 15.3 | 12.2 | 9.5 | 16.2 | 15.6 | 11.3 | 14.3 | 12.3 | 13.3 | 15.5 | 10.3 | 9.7 | 11.4 | 10.6 |
| 2132 |  Szekesfehervar, Hungary | 13.3 | 18.9 | 25 | 16.7 | 12.5 | 5.8 | 10.2 | 10 | 5.8 | 10.2 | 17 | 20.6 | 18.2 | 14.9 | - | - | - |
| 2133 |  Acerra, Italy | 13.3 | 21.5 | 36.8 | 12.2 | 8.6 | 3.1 | 8.4 | 8.2 | 5.2 | 7.6 | 6.1 | 12.1 | 32 | - | - | - | - |
| 2134 | Cava De Tirreni, Italy | 13.3 | 18.3 | 21 | 15.4 | 8.7 | 6.8 | 16 | 8.5 | 11.2 | 14.2 | 12 | 13.3 | 14.5 | - | - | - | - |
| 2135 | Trento, Italy | 13.3 | 19.8 | 23.2 | 15.8 | 10 | 5.9 | 11.7 | 10.7 | 10 | 12.8 | 11.7 | 13.3 | 16.2 | 13.7 | 11.9 | - | - |
| 2136 |  Hofu, Japan | 13.3 | 8.5 | 11.5 | 14.5 | 11.5 | 14.3 | 18.2 | 15.3 | 11.2 | 14.2 | 12.7 | 13.7 | 11.6 | 12.1 | 12.4 | 12.3 | 13 |
| 2137 |  Vitina, Kosovo | 13.3 | 21 | 28.8 | 15.2 | 7.4 | 3.2 | 7.6 | 11 | 9 | 8.8 | 22 | 104.9 | 25.5 | 27.2 | 22.8 | - | - |
| 2138 |  Santiago, Mexico | 13.3 | 12.6 | 18.3 | 15.4 | 19.3 | 14.1 | 12.7 | - | 9.7 | 12.1 | 10.6 | 10.5 | 10.9 | - | - | - | - |
| 2139 |  Ulaan-Uul, Mongolia | 13.3 | 16.8 | 18 | 16.4 | 12.4 | 19.1 | 9.9 | 8.7 | 17.6 | 8.8 | 9.2 | 12.9 | 10.9 | - | - | - | - |
| 2140 |  Ilinden, North Macedonia | 13.3 | - | - | - | 11.5 | 5.7 | 9.4 | 10.8 | 9.6 | 8.3 | 18 | 25.3 | 25.2 | - | - | - | - |
| 2141 |  Borovnica, Slovenia | 13.3 | - | 16.6 | 18 | 11.7 | 5 | 12.7 | 11 | 8.5 | 12 | 18.9 | 17.7 | 15.5 | - | - | - | - |
| 2142 |  Tha Maka, Thailand | 13.3 | - | - | 39.9 | 17.6 | 10.3 | 6.3 | 5.1 | 6.9 | 6.6 | 11.3 | 21.8 | 38.2 | - | - | - | - |
| 2143 | Carmichael, USA | 13.3 | 19.3 | 11.4 | 7.5 | 6 | 3.7 | 4 | 8.7 | 29.5 | 16 | 8.7 | 24.3 | 18.9 | - | - | - | - |
| 2144 | Somerset, USA | 13.3 | 10.9 | 7.1 | 4.7 | 4.1 | 2.4 | 3.8 | 6.6 | 64.7 | 16.4 | 8.8 | 10 | 9.4 | 14.7 | 6 | - | - |
| 2145 | Stockton, USA | 13.3 | 22.5 | 12.7 | 7.3 | 5.6 | 4.6 | 4.6 | 7.3 | 24.6 | 14.3 | 10.4 | 25.8 | 19.7 | 16.1 | 9.6 | 17.7 | 12.5 |
| 2146 | Torrance, USA | 13.3 | 14 | 12.2 | 7.4 | 10 | 9.4 | 9.9 | 13.2 | 16.1 | 16.9 | 10.5 | 23 | 17.8 | 14.4 | 11.6 | - | - |
| 2147 | Atlanta, USA | 13.3 | 11.5 | 12.6 | 13.9 | 13.3 | 11.5 | 11.4 | 15.8 | 15.7 | 14.4 | 12.1 | 12.6 | 14.9 | 10 | 11.9 | 10.6 | 11.3 |
| 2148 | Evans, USA | 13.3 | 10.2 | 7.2 | 14.8 | 16.6 | - | - | 14.2 | 14.4 | 15 | 13.3 | 12.5 | 13.1 | - | 13.5 | - | - |
| 2149 | Flowery Branch, USA | 13.3 | - | 18.2 | 13 | 13.5 | 12.6 | 11.6 | 15.2 | 15.5 | 13.5 | 11.4 | 11.5 | 13.7 | - | - | - | - |
| 2150 | Bloomington, USA | 13.3 | 15.3 | 18.6 | 12 | 12.3 | 12 | 11.4 | 19.1 | 16.1 | 10.6 | 10.3 | 11 | 11.1 | - | 8.4 | 9.8 | 6.5 |
Stay Informed. Download #1 air quality app
Rated 4.8Air pollution forecast, pollution alerts and much more to help you plan your days and keep protected against air pollution
