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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2565 |  Winchester USA | 6.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2566 | Brookline USA | 6.1 | 5.7 | 6.8 | 6.9 | 8.8 | -- | -- | -- | -- |
| 2567 | Greenfield USA | 6.1 | 5.8 | 9.1 | 7.3 | 8.9 | 8.4 | 7 | 5.9 | 5.6 |
| 2568 | Lakes of the North USA | 6.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2569 | Alberton USA | 6.1 | 6.1 | -- | -- | -- | -- | -- | -- | -- |
| 2570 | Bigfork USA | 6.1 | 6.2 | 9.4 | 10.2 | 13.4 | -- | 6.7 | -- | -- |
| 2571 | Barnstead USA | 6.1 | 5.6 | 8.3 | 7.2 | 8.3 | -- | -- | -- | -- |
| 2572 | Effingham USA | 6.1 | 5.5 | 6.4 | -- | -- | -- | -- | -- | -- |
| 2573 | Atlantic City USA | 6.1 | 5.9 | 6.3 | -- | -- | -- | -- | -- | -- |
| 2574 | Lincroft USA | 6.1 | 5.8 | 10 | -- | -- | -- | -- | -- | -- |
| 2575 | Auburn USA | 6.1 | 5.7 | 8.7 | -- | -- | -- | -- | -- | -- |
| 2576 | Averill Park USA | 6.1 | 5.6 | 6.3 | -- | -- | -- | -- | -- | -- |
| 2577 | Briarwood USA | 6.1 | 7.6 | -- | -- | -- | -- | -- | -- | -- |
| 2578 | Clinton USA | 6.1 | 5.7 | 8.8 | -- | -- | -- | -- | -- | -- |
| 2579 | Millbrook USA | 6.1 | 2.4 | 7.4 | -- | -- | -- | -- | -- | -- |
| 2580 | Warren USA | 6.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2581 | Worcester USA | 6.1 | 5.8 | 8.7 | -- | -- | -- | -- | -- | -- |
| 2582 | Boone USA | 6.1 | 5.5 | 7.2 | 6.5 | -- | -- | -- | -- | -- |
| 2583 | Edenton USA | 6.1 | 6.3 | 10.2 | 9.7 | -- | -- | -- | -- | -- |
| 2584 | Hillsborough USA | 6.1 | 7.9 | 10.9 | -- | -- | -- | -- | -- | -- |
| 2585 | Murfreesboro USA | 6.1 | 6.6 | 10 | -- | -- | -- | -- | -- | -- |
| 2586 | Pittsboro USA | 6.1 | 5.1 | 9.5 | 6 | 11.7 | -- | -- | -- | -- |
| 2587 | Siler City USA | 6.1 | 6.1 | 7.9 | 5 | 6.2 | 6.6 | 9.8 | -- | -- |
| 2588 | Watford City USA | 6.1 | 5.8 | 8.1 | 5.2 | -- | -- | -- | -- | -- |
| 2589 | Cottage Grove USA | 6.1 | 6.2 | 8 | 11 | 7.2 | 17.1 | 9.9 | 8.4 | 11 |
| 2590 | Tualatin USA | 6.1 | 5.3 | 7.3 | 10.5 | 8.6 | 14.7 | 9.9 | -- | -- |
| 2591 | Elizabethville USA | 6.1 | 6.4 | 11.1 | -- | -- | -- | -- | -- | -- |
| 2592 | Providence USA | 6.1 | 5.4 | 8.4 | 7.2 | 8.6 | 7.7 | 8 | 7.9 | 7.3 |
| 2593 | Fort Duchesne USA | 6.1 | 8.2 | -- | -- | -- | -- | -- | -- | -- |
| 2594 | Logan USA | 6.1 | 8.2 | 9.8 | 9.4 | 12.1 | -- | 5 | -- | -- |
| 2595 | Woods Cross USA | 6.1 | 7.6 | 7.9 | 8.7 | 12.8 | -- | -- | -- | -- |
| 2596 | Montpelier USA | 6.1 | 5.6 | 7.3 | 10.1 | -- | -- | -- | -- | -- |
| 2597 | Culpeper USA | 6.1 | 6.1 | 10 | 10.2 | 12.6 | -- | -- | -- | -- |
| 2598 | Puyallup USA | 6.1 | 5.3 | 7.7 | 11.4 | 7.6 | 11 | 9 | 8.1 | 7.2 |
| 2599 | Gary USA | 6.1 | 6 | 4.9 | -- | -- | -- | -- | -- | -- |
| 2600 |  Canmore Canada | 6 | 5.9 | 10.1 | 6.5 | 13.8 | -- | -- | -- | -- |
| 2601 | 108 Mile Ranch Canada | 6 | 4.6 | -- | -- | -- | -- | -- | -- | -- |
| 2602 | Courtenay Canada | 6 | 5.4 | 7 | 8 | 7.6 | 9.2 | 8.6 | -- | -- |
| 2603 | Kamloops Canada | 6 | 5.9 | 13.1 | 7.7 | 16.1 | 5.8 | 6.3 | -- | -- |
| 2604 | Sun Peaks Canada | 6 | 4.7 | 8.2 | -- | -- | -- | -- | -- | -- |
| 2605 | Sept-Iles Canada | 6 | 5.4 | 6.2 | -- | -- | -- | -- | -- | -- |
| 2606 | Brentwood USA | 6 | 5.9 | 6.5 | 7.6 | 10 | 14.5 | 6.7 | -- | -- |
| 2607 | Callender USA | 6 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 2608 | Davis USA | 6 | 5.8 | 6.9 | 8.2 | 10.6 | 15.1 | 7.7 | 11.2 | 9.1 |
| 2609 | Durham USA | 6 | 6.9 | 7.3 | 8.5 | 13.7 | -- | -- | -- | -- |
| 2610 | Idyllwild-Pine Cove USA | 6 | 5.6 | 5.2 | 4.2 | 6.1 | -- | -- | -- | -- |
| 2611 | Lake Shastina USA | 6 | 7.4 | -- | -- | -- | -- | -- | -- | -- |
| 2612 | Los Alamos USA | 6 | 4.2 | -- | -- | -- | -- | -- | -- | -- |
| 2613 | Lost Hills USA | 6 | 8.3 | 7.6 | 9.4 | 11.7 | -- | -- | -- | -- |
| 2614 | Manila USA | 6 | 7.5 | -- | -- | -- | -- | -- | -- | -- |
