2017-2025
World's most polluted cities
The most polluted cities according to data aggregated from over 80,000 data points.
2025
World Air Quality Report
2025
World Air Quality Report
PM2.5 legend (concentration in μg/m3 categorized by WHO guideline)
0-5Meets WHO guideline
5.1-10Exceeds by 1 to 2 times
10.1-15Exceeds by 2 to 3 times
15.1-25Exceeds by 3 to 5 times
25.1-35Exceeds by 5 to 7 times
35.1-50Exceeds by 7 to 10 times
>50.1Exceeds by over 10 times
| Rank | City | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2114 |  McGregor USA | 6.7 | 5 | 11 | 4.9 | 11.5 | -- | -- | -- | -- |
| 2115 | Springfield USA | 6.7 | 6 | 6.9 | 6.8 | 6.3 | 7.4 | 7.3 | 7.7 | 7.6 |
| 2116 | Thompson Falls USA | 6.7 | 7.3 | 8.6 | 8.2 | 12.2 | 8.5 | 7.1 | 9.5 | -- |
| 2117 | Alma USA | 6.7 | 7 | -- | -- | -- | -- | -- | -- | -- |
| 2118 | Ralston USA | 6.7 | 8.1 | -- | -- | -- | -- | -- | -- | -- |
| 2119 | Brielle USA | 6.7 | 6.4 | 10.1 | -- | -- | -- | -- | -- | -- |
| 2120 | Broome USA | 6.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2121 | Highland USA | 6.7 | 6.4 | 8.9 | -- | -- | -- | -- | -- | -- |
| 2122 | Morris Heights USA | 6.7 | 6 | 7.6 | -- | -- | -- | -- | -- | -- |
| 2123 | Schenectady USA | 6.7 | 6.7 | 9.8 | 9.3 | -- | -- | -- | -- | -- |
| 2124 | Scotts Corners USA | 6.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2125 | Watertown USA | 6.7 | 5.9 | 6.4 | -- | -- | -- | -- | -- | -- |
| 2126 | Black Mountain USA | 6.7 | 6.7 | 8.2 | -- | -- | -- | -- | -- | -- |
| 2127 | Raleigh USA | 6.7 | 7.2 | 11 | 10.4 | 12.2 | 9.8 | 11.3 | 9.8 | 9.4 |
| 2128 | Weaverville USA | 6.7 | 6.7 | 9.4 | 2.1 | 13 | -- | -- | -- | -- |
| 2129 | Healdton USA | 6.7 | 8.6 | 8.2 | 7.5 | 8.8 | 9.4 | 7.7 | 8.7 | 8.2 |
| 2130 | Black Butte Ranch USA | 6.7 | 9.6 | 8.8 | 7.8 | -- | -- | -- | -- | -- |
| 2131 | Jackson USA | 6.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2132 | Metzger USA | 6.7 | 6.3 | 7.6 | -- | -- | -- | -- | -- | -- |
| 2133 | Millersburg USA | 6.7 | 6 | 9.6 | -- | -- | -- | -- | -- | -- |
| 2134 | Waldport USA | 6.7 | 6.5 | 8.5 | 7.4 | 9.6 | -- | -- | -- | -- |
| 2135 | Johnstown USA | 6.7 | 6.7 | 10.1 | 10.1 | 9.8 | 8.5 | 9.2 | -- | -- |
| 2136 | Uniontown USA | 6.7 | 6.2 | 7 | 7.7 | 8.4 | 7.6 | 8.1 | -- | -- |
| 2137 | Pawtucket USA | 6.7 | 5.4 | 7.3 | -- | -- | -- | -- | -- | -- |
| 2138 | Blacksburg USA | 6.7 | 7.1 | 11.3 | 10.5 | 12.9 | -- | -- | -- | -- |
| 2139 | Jarrell USA | 6.7 | 9.7 | 10 | -- | -- | -- | -- | -- | -- |
| 2140 | League City USA | 6.7 | 1.8 | 10.3 | 6.7 | 7.5 | 9.7 | 11.5 | -- | -- |
| 2141 | Lubbock USA | 6.7 | 6.2 | 6.5 | 7 | 7.5 | 6.4 | 9 | 6.9 | -- |
| 2142 | Burke USA | 6.7 | 6.1 | 11.2 | 8.3 | 10.1 | 8.7 | 11.2 | -- | -- |
| 2143 | Fredericksburg USA | 6.7 | 7.1 | 10.5 | 9.2 | 6.5 | 4.2 | 6.1 | -- | -- |
| 2144 | Norfolk USA | 6.7 | 6.5 | 10.4 | 6 | 9.3 | -- | -- | -- | -- |
| 2145 | South Riding USA | 6.7 | 6.6 | 10.5 | 7 | 9.5 | -- | -- | -- | -- |
| 2146 | Hoodsport USA | 6.7 | 2.8 | 5 | 6.4 | -- | -- | -- | -- | -- |
| 2147 | Mead USA | 6.7 | 5.7 | 6 | 8.5 | 9.4 | -- | -- | -- | -- |
| 2148 | Walla Walla East USA | 6.7 | 6.5 | 9.9 | 6.9 | -- | -- | -- | -- | -- |
| 2149 | Wilson Creek USA | 6.7 | 5.8 | -- | -- | -- | -- | -- | -- | -- |
| 2150 | Middleway USA | 6.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2151 |  Houston Canada | 6.6 | 6.4 | 11.2 | 9.7 | 10.1 | 8.4 | 12.8 | -- | -- |
| 2152 | Kelowna Canada | 6.6 | 5.5 | 11.1 | 7.7 | 16.7 | 7.7 | 7.1 | -- | -- |
| 2153 | Princeton Canada | 6.6 | 6.1 | 8.1 | -- | -- | -- | -- | -- | -- |
| 2154 | West Kelowna Canada | 6.6 | 5.7 | 19.1 | 7.2 | 36.5 | -- | -- | -- | -- |
| 2155 | Nepean Canada | 6.6 | 9.1 | 1 | -- | -- | -- | -- | -- | -- |
| 2156 | Quinte West Canada | 6.6 | 5.6 | 7.3 | -- | -- | -- | -- | -- | -- |
| 2157 | Antioch USA | 6.6 | 6 | 7.2 | 9.2 | 11 | 15.4 | 7.7 | -- | -- |
| 2158 | Arden-Arcade USA | 6.6 | 6.8 | 8.5 | 10.1 | 13.2 | -- | -- | -- | -- |
| 2159 | Camp Nelson USA | 6.6 | 7.4 | -- | -- | -- | -- | -- | -- | -- |
| 2160 | Chico USA | 6.6 | 6.4 | 7.3 | 8.9 | 12.9 | 16.8 | 7 | 17.6 | 12.8 |
| 2161 | El Centro USA | 6.6 | 7.1 | 6.3 | 7.2 | 9.7 | 11.5 | 7.4 | -- | -- |
| 2162 | Indio USA | 6.6 | 8.1 | 9.4 | 8.6 | 8.3 | 11.9 | -- | -- | -- |
| 2163 | Inyokern USA | 6.6 | 6.3 | 4.2 | 3 | 12.1 | -- | -- | -- | -- |
