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
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4034 |  Oak Creek USA | 4 | 4 | 2.5 | 2.3 | -- | -- | -- | -- | -- |
| 4035 | Guilford USA | 4 | 3.1 | 7.1 | 5.5 | 7.5 | 8.3 | 8.7 | -- | -- |
| 4036 | Sandalfoot Cove USA | 4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 4037 | Kahului USA | 4 | 4.2 | 4 | 4.4 | 4.5 | 4.5 | 4.3 | 3.7 | 4.8 |
| 4038 | Victor USA | 4 | 5.2 | 4.3 | 4.9 | 16.5 | -- | -- | -- | -- |
| 4039 | Bar Harbor USA | 4 | 3.4 | 4.7 | 6.9 | 6.9 | 3.2 | 4.1 | 4.1 | 4.4 |
| 4040 | Vinalhaven USA | 4 | 3.7 | 5.9 | -- | -- | -- | -- | -- | -- |
| 4041 | East Longmeadow USA | 4 | 3.4 | 6.9 | 5 | -- | -- | -- | -- | -- |
| 4042 | Templeton USA | 4 | 3.6 | 6.6 | 4.3 | -- | -- | -- | -- | -- |
| 4043 | Choteau USA | 4 | 4.9 | 4 | -- | -- | -- | -- | -- | -- |
| 4044 | Crystal Bay USA | 4 | 4.4 | 4.8 | 7 | -- | -- | -- | -- | -- |
| 4045 | Gerlach USA | 4 | 4.3 | 3.9 | 2.1 | -- | -- | -- | -- | -- |
| 4046 | Mescalero USA | 4 | 5 | -- | -- | -- | -- | -- | -- | -- |
| 4047 | New Hampton USA | 4 | 3.9 | 8.3 | 6.9 | -- | -- | -- | -- | -- |
| 4048 | Barnardsville USA | 4 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 4049 | Troutdale USA | 4 | 2.5 | 5.4 | 8.9 | 7.4 | -- | -- | -- | -- |
| 4050 | Pleasant Grove USA | 4 | 4.6 | 6.5 | 7.2 | 7.4 | -- | -- | -- | -- |
| 4051 | Beaux Arts Village USA | 4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 4052 | Bellevue USA | 4 | 3.5 | 5 | 8.7 | 5.1 | 7.4 | 5.6 | 5.5 | -- |
| 4053 | Concrete USA | 4 | 3.8 | 5.3 | 11 | -- | -- | -- | -- | -- |
| 4054 | Cottage Lake USA | 4 | 3.5 | 5 | 11 | 5.6 | -- | -- | -- | -- |
| 4055 | Mukilteo USA | 4 | 3.7 | 5.1 | 8.2 | 5.5 | -- | -- | -- | -- |
| 4056 | Rockport USA | 4 | 7.5 | -- | -- | -- | -- | -- | -- | -- |
| 4057 | Seabeck USA | 4 | 3.2 | 4.4 | -- | -- | -- | -- | -- | -- |
| 4058 | Snohomish USA | 4 | 3.5 | 5.2 | 9.1 | 6 | -- | -- | -- | -- |
| 4059 | Trout Lake USA | 4 | 3.3 | 5 | 6 | -- | -- | -- | -- | -- |
| 4060 | Whatcom USA | 4 | 3.1 | 7.4 | 13.9 | 4.7 | -- | -- | -- | -- |
| 4061 |  North Saanich Canada | 3.9 | 3.8 | -- | -- | -- | -- | -- | -- | -- |
| 4062 | St Andrews Canada | 3.9 | 3.9 | 5.2 | 3.4 | 3.6 | 3.5 | 4.2 | 5.8 | 5.6 |
| 4063 | Pictou Canada | 3.9 | 3.9 | 5.1 | 4.5 | 4.9 | 4.5 | 4.9 | -- | -- |
| 4064 | Charlottetown Canada | 3.9 | 4.3 | 4.9 | 4.3 | 4.7 | 6.4 | 8.1 | 9.7 | 9.9 |
| 4065 | Cabano Canada | 3.9 | 3.7 | 6.2 | 3.8 | 5.1 | -- | -- | -- | -- |
| 4066 | Beaver Creek Canada | 3.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 4067 | Fox USA | 3.9 | 3.9 | 5.8 | 9.6 | -- | -- | -- | -- | -- |
| 4068 | Benbow USA | 3.9 | 4.4 | -- | -- | -- | -- | -- | -- | -- |
| 4069 | Cedar Flat USA | 3.9 | 4.4 | -- | -- | -- | -- | -- | -- | -- |
| 4070 | Day Valley USA | 3.9 | 3.6 | 5.3 | 4.3 | 6.5 | -- | -- | -- | -- |
| 4071 | Diablo USA | 3.9 | 4 | 5.1 | 6.4 | 9.7 | -- | -- | -- | -- |
| 4072 | East Richmond Heights USA | 3.9 | 3.7 | 5.5 | 7.1 | 8.1 | -- | -- | -- | -- |
| 4073 | Kensington USA | 3.9 | 3.9 | 5.9 | 7.4 | 7.6 | 9.7 | 6.7 | -- | -- |
| 4074 | Larkfield-Wikiup USA | 3.9 | 4 | 7.1 | 5.6 | 8.4 | -- | -- | -- | -- |
| 4075 | Mill Valley USA | 3.9 | 3.8 | 5 | 6.4 | 6.6 | 8.7 | 5.4 | -- | -- |
| 4076 | Portola Valley USA | 3.9 | 3.7 | 4.6 | 5.2 | 6.4 | 9.4 | 5.2 | -- | -- |
| 4077 | San Luis Obispo USA | 3.9 | 3.6 | 4.8 | 5.8 | 6.3 | 9.2 | 5.4 | 7.6 | 8.4 |
| 4078 | Walker USA | 3.9 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 4079 | Florida City USA | 3.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 4080 | Gering USA | 3.9 | 4.4 | -- | -- | -- | -- | -- | -- | -- |
| 4081 | Incline Village USA | 3.9 | 4.1 | 4 | 5.8 | 18.5 | 12.1 | -- | -- | -- |
| 4082 | Jemez Springs USA | 3.9 | 3.8 | 2.7 | 2 | -- | -- | -- | -- | -- |
| 4083 | Silver City USA | 3.9 | 3.4 | 3.3 | 2.2 | 7.4 | -- | -- | -- | -- |
