The world's most polluted cities, ranked

478 of 2,623 measured cities in 86 countries breathed air above the WHO 24-hour guideline of 15 µg/m³ over the last 30 days. The worst was Miryang, South Korea, at 307.9.

#5 Gaigeturi 195.2 µg/m³, more polluted than 99% of 2,623
← Miryang 307.9 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every ranked city, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1MiryangGyeongsangnam-do, South Korea 358
  2. 2HwasunJeollanam-do, South Korea 338
  3. 3NangenJeollabuk-do, South Korea 299
  4. 4SeosanChungcheongnam-do, South Korea 275
  5. 5GaigeturiJeju-do, South Korea 246
  6. 6Hwaseong-siGyeonggi-do, South Korea 233
  7. 7Taesal-liChungcheongnam-do, South Korea 227
  8. 8KosongGangwon-do, South Korea 222
  9. 9SeogwipoJeju-do, South Korea 219
  10. 10AnseongGyeonggi-do, South Korea 216
  11. 11SinhyeonGyeongsangnam-do, South Korea 191
  12. 12NonsanChungcheongnam-do, South Korea 180
  13. 13ChangsuJeollabuk-do, South Korea 170
  14. 14MokpoJeollanam-do, South Korea 168
  15. 15KimjeJeollabuk-do, South Korea 167
  16. 16JeongeupJeollabuk-do, South Korea 166
  17. 17HadongGyeongsangnam-do, South Korea 165
  18. 18Yangp'yŏngGyeonggi-do, South Korea 164
  19. 19CheorwonGangwon-do, South Korea 163
  20. 20KunwiGyeongsangbuk-do, South Korea 162
  21. 21GeojeGyeongsangnam-do, South Korea 150
  22. 22ChinjuGyeongsangnam-do, South Korea 147
  23. 23YesanChungcheongnam-do, South Korea 146
  24. 24PubalGyeonggi-do, South Korea 145
  25. 25BuanJeollabuk-do, South Korea 145
  26. 26YeojuGyeonggi-do, South Korea 145
  27. 27YŏnmuChungcheongnam-do, South Korea 143
  28. 28NamsaJeollabuk-do, South Korea 142
  29. 29YangsanGyeongsangnam-do, South Korea 140
  30. 30BuyeoChungcheongnam-do, South Korea 140
  31. 30HwawŏnDaegu, South Korea 140
  32. 32GunsanJeollabuk-do, South Korea 136
  33. 33TangjinChungcheongnam-do, South Korea 133
  34. 34GangneungGangwon-do, South Korea 130
  35. 35Cheongju-siNorth Chungcheong, South Korea 128
  36. 36YeonggwangJeollanam-do, South Korea 127
  37. 37YecheonGyeongsangbuk-do, South Korea 126
  38. 38JungpyongNorth Chungcheong, South Korea 126
  39. 39Ganghwa-gunIncheon, South Korea 126
  40. 40KoesanNorth Chungcheong, South Korea 126
  41. 41GoseongGyeongsangnam-do, South Korea 125
  42. 42YeongdongNorth Chungcheong, South Korea 125
  43. 42YangjuGyeonggi-do, South Korea 125
  44. 42BoryeongChungcheongnam-do, South Korea 125
  45. 45JangheungJeollanam-do, South Korea 122
  46. 46Jeju CityJeju-do, South Korea 122
  47. 47Koch'angJeollabuk-do, South Korea 120
  48. 48Icheon-siGyeonggi-do, South Korea 120
  49. 49MuanJeollanam-do, South Korea 119
  50. 50HongseongChungcheongnam-do, South Korea 118
All 2,623 cities
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Who led, day by day

Hwasun2 days #12026-09-02: 424.0 µg/m³2026-09-03: 13.4 µg/m³2026-09-04: 8.0 µg/m³2026-09-05: 422.0 µg/m³, #52026-09-06: 1,260.0 µg/m³, #12026-09-07: 12.2 µg/m³2026-09-08: 11.8 µg/m³2026-09-09: 9.9 µg/m³2026-09-10: 839.0 µg/m³, #42026-09-11: 426.0 µg/m³2026-09-12: 843.0 µg/m³, #22026-09-13: 844.0 µg/m³, #12026-09-14: 845.0 µg/m³, #82026-09-15: 433.0 µg/m³2026-09-16: 15.4 µg/m³2026-09-17: 423.0 µg/m³2026-09-18: 424.0 µg/m³2026-09-19: 425.0 µg/m³, #32026-09-20: 425.0 µg/m³, #32026-09-21: 428.0 µg/m³2026-09-22: 12.6 µg/m³2026-09-23: 12.1 µg/m³2026-09-24: 10.4 µg/m³2026-09-25: 17.3 µg/m³2026-09-26: 5.8 µg/m³2026-09-27: 8.1 µg/m³2026-09-28: 10.8 µg/m³2026-09-29: 10.9 µg/m³2026-09-30: 10.0 µg/m³2026-10-01: 8.3 µg/m³Miryang2 days #12026-09-02: 1,260.0 µg/m³, #32026-09-03: 15.8 µg/m³2026-09-04: 7.3 µg/m³2026-09-05: 5.4 µg/m³2026-09-06: 10.3 µg/m³2026-09-07: 12.5 µg/m³2026-09-08: 7.1 µg/m³2026-09-09: 840.0 µg/m³, #72026-09-10: 423.0 µg/m³2026-09-11: 839.0 µg/m³2026-09-12: 425.0 µg/m³, #52026-09-15: 14.4 µg/m³2026-09-16: 842.0 µg/m³2026-09-17: 5.8 µg/m³2026-09-18: 1,260.0 µg/m³, #12026-09-19: 842.0 µg/m³, #22026-09-20: 842.0 µg/m³, #12026-09-21: 844.0 µg/m³, #72026-09-22: 10.6 µg/m³2026-09-23: 8.0 µg/m³2026-09-24: 15.3 µg/m³2026-09-25: 19.6 µg/m³2026-09-26: 10.2 µg/m³2026-09-27: 11.0 µg/m³2026-09-28: 15.9 µg/m³2026-09-29: 14.0 µg/m³2026-09-30: 9.8 µg/m³2026-10-01: 11.4 µg/m³Gurugram2 days #12026-09-02: 48.7 µg/m³2026-09-03: 46.3 µg/m³2026-09-04: 30.4 µg/m³2026-09-05: 28.9 µg/m³2026-09-06: 33.2 µg/m³2026-09-07: 45.1 µg/m³2026-09-08: 28.8 µg/m³2026-09-09: 52.3 µg/m³2026-09-10: 82.9 µg/m³2026-09-11: 66.4 µg/m³2026-09-12: 33.5 µg/m³2026-09-13: 24.3 µg/m³2026-09-14: 38.2 µg/m³2026-09-15: 44.2 µg/m³2026-09-16: 31.0 µg/m³2026-09-17: 33.4 µg/m³2026-09-18: 34.3 µg/m³2026-09-19: 111.0 µg/m³, #102026-09-20: 122.9 µg/m³, #92026-09-21: 160.5 µg/m³2026-09-22: 165.1 µg/m³, #42026-09-23: 170.0 µg/m³, #12026-09-24: 112.2 µg/m³, #22026-09-25: 47.2 µg/m³2026-09-26: 57.0 µg/m³2026-09-27: 60.9 µg/m³2026-09-28: 104.0 µg/m³, #12026-09-29: 20.5 µg/m³Kinshasa2 days #12026-09-02: 70.1 µg/m³2026-09-03: 43.2 µg/m³2026-09-04: 73.1 µg/m³2026-09-05: 51.9 µg/m³2026-09-06: 78.5 µg/m³2026-09-07: 111.2 µg/m³2026-09-08: 138.0 µg/m³2026-09-09: 58.3 µg/m³2026-09-10: 70.7 µg/m³2026-09-11: 83.0 µg/m³2026-09-12: 70.9 µg/m³2026-09-14: 86.5 µg/m³2026-09-15: 102.1 µg/m³2026-09-16: 51.1 µg/m³2026-09-17: 56.0 µg/m³2026-09-18: 72.4 µg/m³2026-09-19: 71.9 µg/m³2026-09-20: 73.4 µg/m³2026-09-21: 71.2 µg/m³2026-09-23: 113.0 µg/m³, #32026-09-24: 151.0 µg/m³, #12026-09-25: 114.0 µg/m³, #12026-09-26: 65.6 µg/m³2026-09-27: 50.1 µg/m³2026-09-28: 58.2 µg/m³2026-09-30: 75.5 µg/m³, #42026-10-01: 48.5 µg/m³Gujranwala2 days #12026-09-02: 48.3 µg/m³2026-09-03: 50.9 µg/m³2026-09-04: 45.9 µg/m³2026-09-05: 63.5 µg/m³2026-09-06: 51.0 µg/m³2026-09-07: 69.1 µg/m³2026-09-08: 80.0 µg/m³2026-09-09: 65.9 µg/m³2026-09-10: 49.4 µg/m³2026-09-11: 58.0 µg/m³2026-09-12: 59.6 µg/m³2026-09-13: 77.4 µg/m³, #72026-09-14: 46.7 µg/m³2026-09-15: 45.1 µg/m³2026-09-16: 55.2 µg/m³2026-09-17: 34.1 µg/m³2026-09-18: 46.2 µg/m³2026-09-19: 89.2 µg/m³2026-09-20: 87.6 µg/m³2026-09-21: 130.0 µg/m³2026-09-22: 108.5 µg/m³, #62026-09-23: 104.0 µg/m³, #42026-09-24: 96.4 µg/m³, #52026-09-25: 83.0 µg/m³, #62026-09-26: 67.8 µg/m³, #102026-09-27: 105.5 µg/m³, #12026-09-28: 53.9 µg/m³2026-09-29: 52.5 µg/m³2026-09-30: 81.0 µg/m³, #32026-10-01: 104.0 µg/m³, #1Yesan1 day #12026-09-02: 1,270.0 µg/m³, #12026-09-03: 21.0 µg/m³2026-09-04: 7.9 µg/m³2026-09-05: 7.7 µg/m³2026-09-06: 6.2 µg/m³2026-09-07: 8.9 µg/m³2026-09-08: 16.4 µg/m³2026-09-09: 840.0 µg/m³, #62026-09-10: 7.9 µg/m³2026-09-11: 11.0 µg/m³2026-09-12: 22.2 µg/m³2026-09-13: 26.0 µg/m³2026-09-14: 21.9 µg/m³2026-09-15: 11.3 µg/m³2026-09-16: 13.3 µg/m³2026-09-17: 7.6 µg/m³2026-09-18: 840.0 µg/m³, #62026-09-19: 9.9 µg/m³2026-09-20: 14.0 µg/m³2026-09-21: 17.9 µg/m³2026-09-22: 17.3 µg/m³2026-09-23: 19.3 µg/m³2026-09-24: 19.6 µg/m³2026-09-25: 20.5 µg/m³2026-09-26: 10.7 µg/m³2026-09-27: 13.3 µg/m³2026-09-28: 17.0 µg/m³2026-09-29: 18.6 µg/m³2026-09-30: 17.2 µg/m³2026-10-01: 5.8 µg/m³Gaigeturi1 day #12026-09-02: 1,260.0 µg/m³, #52026-09-03: 1,260.0 µg/m³, #12026-09-04: 632.0 µg/m³, #62026-09-05: 5.5 µg/m³2026-09-06: 8.5 µg/m³2026-09-07: 12.3 µg/m³2026-09-08: 9.8 µg/m³2026-09-09: 425.3 µg/m³2026-09-10: 5.7 µg/m³2026-09-11: 215.0 µg/m³2026-09-12: 7.8 µg/m³2026-09-13: 6.6 µg/m³2026-09-14: 1,260.0 µg/m³, #22026-09-15: 8.6 µg/m³2026-09-16: 9.5 µg/m³2026-09-17: 628.3 µg/m³2026-09-18: 5.7 µg/m³2026-09-19: 8.2 µg/m³2026-09-20: 6.8 µg/m³2026-09-21: 11.7 µg/m³2026-09-22: 8.4 µg/m³2026-09-23: 6.3 µg/m³2026-09-24: 9.3 µg/m³2026-09-25: 9.7 µg/m³2026-09-26: 5.5 µg/m³2026-09-27: 3.7 µg/m³2026-09-28: 6.7 µg/m³2026-09-29: 5.6 µg/m³2026-09-30: 7.3 µg/m³2026-10-01: 6.4 µg/m³Yecheon1 day #12026-09-02: 421.0 µg/m³2026-09-03: 6.3 µg/m³2026-09-04: 1,260.0 µg/m³, #12026-09-05: 5.0 µg/m³2026-09-06: 7.6 µg/m³2026-09-07: 10.0 µg/m³2026-09-08: 10.3 µg/m³2026-09-09: 5.7 µg/m³2026-09-10: 5.8 µg/m³2026-09-11: 7.4 µg/m³2026-09-12: 9.0 µg/m³2026-09-13: 11.3 µg/m³2026-09-15: 14.5 µg/m³2026-09-16: 843.0 µg/m³2026-09-17: 5.9 µg/m³2026-09-18: 8.4 µg/m³2026-09-19: 8.1 µg/m³2026-09-20: 7.9 µg/m³2026-09-21: 12.0 µg/m³2026-09-22: 9.8 µg/m³2026-09-23: 8.3 µg/m³2026-09-24: 15.3 µg/m³2026-09-25: 17.8 µg/m³2026-09-26: 9.2 µg/m³2026-09-27: 8.5 µg/m³2026-09-28: 12.2 µg/m³2026-09-29: 10.0 µg/m³2026-09-30: 10.9 µg/m³2026-10-01: 8.4 µg/m³Cheorwon1 day #12026-09-02: 427.0 µg/m³2026-09-03: 13.0 µg/m³2026-09-04: 10.4 µg/m³2026-09-05: 1,260.0 µg/m³, #12026-09-06: 5.6 µg/m³2026-09-07: 1,050.5 µg/m³, #32026-09-08: 12.5 µg/m³2026-09-09: 217.2 µg/m³2026-09-10: 8.4 µg/m³2026-09-11: 11.2 µg/m³2026-09-12: 16.8 µg/m³2026-09-13: 17.5 µg/m³2026-09-14: 19.3 µg/m³2026-09-15: 13.5 µg/m³2026-09-16: 12.4 µg/m³2026-09-17: 11.4 µg/m³2026-09-18: 218.6 µg/m³2026-09-19: 12.4 µg/m³2026-09-20: 13.7 µg/m³2026-09-21: 224.2 µg/m³2026-09-22: 20.0 µg/m³2026-09-23: 18.5 µg/m³2026-09-24: 19.9 µg/m³2026-09-25: 12.5 µg/m³2026-09-26: 7.7 µg/m³2026-09-27: 15.8 µg/m³2026-09-28: 16.9 µg/m³2026-09-29: 12.5 µg/m³2026-09-30: 15.5 µg/m³2026-10-01: 9.5 µg/m³T’aebaek1 day #12026-09-02: 419.0 µg/m³2026-09-03: 3.7 µg/m³2026-09-04: 3.3 µg/m³2026-09-05: 2.3 µg/m³2026-09-06: 4.1 µg/m³2026-09-07: 1,260.0 µg/m³, #12026-09-08: 4.4 µg/m³2026-09-09: 3.1 µg/m³2026-09-10: 2.7 µg/m³2026-09-11: 3.0 µg/m³2026-09-12: 3.5 µg/m³2026-09-13: 8.5 µg/m³2026-09-14: 11.1 µg/m³2026-09-15: 9.0 µg/m³2026-09-16: 7.3 µg/m³2026-09-17: 3.1 µg/m³2026-09-18: 3.5 µg/m³2026-09-19: 5.0 µg/m³2026-09-20: 6.3 µg/m³2026-09-21: 6.9 µg/m³2026-09-22: 5.4 µg/m³2026-09-23: 4.6 µg/m³2026-09-24: 10.0 µg/m³2026-09-25: 9.3 µg/m³2026-09-26: 4.4 µg/m³2026-09-27: 4.4 µg/m³2026-09-28: 8.6 µg/m³2026-09-29: 4.8 µg/m³2026-09-30: 7.6 µg/m³2026-10-01: 9.0 µg/m³Sep 2Oct 1
Every city that was the world's most polluted on at least one of the last 30 days. Filled square: #1 that day; ring: in the top 10; dot: measured but lower. Each city's own local day.

The world's air, last 30 days

2026-09-02: 126 of 2649 cities severely polluted (5%)2026-09-02: 1 of 2649 cities moderately polluted (0%)2026-09-02: 4 of 2649 cities lightly polluted (0%)2026-09-02: 54 of 2649 cities good (2%)2026-09-02: 2464 of 2649 cities excellent (93%)Sep 22026-09-03: 17 of 2653 cities severely polluted (1%)2026-09-03: 6 of 2653 cities heavily polluted (0%)2026-09-03: 1 of 2653 cities moderately polluted (0%)2026-09-03: 4 of 2653 cities lightly polluted (0%)2026-09-03: 65 of 2653 cities good (2%)2026-09-03: 2560 of 2653 cities excellent (96%)2026-09-04: 14 of 2654 cities severely polluted (1%)2026-09-04: 3 of 2654 cities heavily polluted (0%)2026-09-04: 2 of 2654 cities lightly polluted (0%)2026-09-04: 60 of 2654 cities good (2%)2026-09-04: 2575 of 2654 cities excellent (97%)2026-09-05: 9 of 2662 cities severely polluted (0%)2026-09-05: 5 of 2662 cities heavily polluted (0%)2026-09-05: 4 of 2662 cities lightly polluted (0%)2026-09-05: 44 of 2662 cities good (2%)2026-09-05: 2600 of 2662 cities excellent (98%)2026-09-06: 6 of 2455 cities severely polluted (0%)2026-09-06: 5 of 2455 cities heavily polluted (0%)2026-09-06: 1 of 2455 cities moderately polluted (0%)2026-09-06: 8 of 2455 cities lightly polluted (0%)2026-09-06: 55 of 2455 cities good (2%)2026-09-06: 2380 of 2455 cities excellent (97%)2026-09-07: 19 of 2637 cities severely polluted (1%)2026-09-07: 4 of 2637 cities heavily polluted (0%)2026-09-07: 1 of 2637 cities moderately polluted (0%)2026-09-07: 3 of 2637 cities lightly polluted (0%)2026-09-07: 81 of 2637 cities good (3%)2026-09-07: 2529 of 2637 cities excellent (96%)Sep 72026-09-08: 10 of 2600 cities severely polluted (0%)2026-09-08: 2 of 2600 cities heavily polluted (0%)2026-09-08: 3 of 2600 cities moderately polluted (0%)2026-09-08: 6 of 2600 cities lightly polluted (0%)2026-09-08: 84 of 2600 cities good (3%)2026-09-08: 2495 of 2600 cities excellent (96%)2026-09-09: 23 of 2631 cities severely polluted (1%)2026-09-09: 8 of 2631 cities heavily polluted (0%)2026-09-09: 1 of 2631 cities moderately polluted (0%)2026-09-09: 6 of 2631 cities lightly polluted (0%)2026-09-09: 89 of 2631 cities good (3%)2026-09-09: 2504 of 2631 cities excellent (95%)2026-09-10: 17 of 2579 cities severely polluted (1%)2026-09-10: 5 of 2579 cities heavily polluted (0%)2026-09-10: 7 of 2579 cities lightly polluted (0%)2026-09-10: 92 of 2579 cities good (4%)2026-09-10: 2458 of 2579 cities excellent (95%)2026-09-11: 25 of 2411 cities severely polluted (1%)2026-09-11: 6 of 2411 cities heavily polluted (0%)2026-09-11: 4 of 2411 cities lightly polluted (0%)2026-09-11: 78 of 2411 cities good (3%)2026-09-11: 2298 of 2411 cities excellent (95%)2026-09-12: 5 of 2468 cities severely polluted (0%)2026-09-12: 1 of 2468 cities heavily polluted (0%)2026-09-12: 5 of 2468 cities lightly polluted (0%)2026-09-12: 68 of 2468 cities good (3%)2026-09-12: 2389 of 2468 cities excellent (97%)2026-09-13: 4 of 2303 cities severely polluted (0%)2026-09-13: 1 of 2303 cities heavily polluted (0%)2026-09-13: 1 of 2303 cities moderately polluted (0%)2026-09-13: 1 of 2303 cities lightly polluted (0%)2026-09-13: 76 of 2303 cities good (3%)2026-09-13: 2220 of 2303 cities excellent (96%)2026-09-14: 14 of 2455 cities severely polluted (1%)2026-09-14: 3 of 2455 cities heavily polluted (0%)2026-09-14: 1 of 2455 cities moderately polluted (0%)2026-09-14: 5 of 2455 cities lightly polluted (0%)2026-09-14: 64 of 2455 cities good (3%)2026-09-14: 2368 of 2455 cities excellent (96%)Sep 142026-09-15: 16 of 2545 cities severely polluted (1%)2026-09-15: 6 of 2545 cities heavily polluted (0%)2026-09-15: 2 of 2545 cities moderately polluted (0%)2026-09-15: 3 of 2545 cities lightly polluted (0%)2026-09-15: 79 of 2545 cities good (3%)2026-09-15: 2439 of 2545 cities excellent (96%)2026-09-16: 32 of 2624 cities severely polluted (1%)2026-09-16: 3 of 2624 cities heavily polluted (0%)2026-09-16: 1 of 2624 cities moderately polluted (0%)2026-09-16: 6 of 2624 cities lightly polluted (0%)2026-09-16: 91 of 2624 cities good (3%)2026-09-16: 2491 of 2624 cities excellent (95%)2026-09-17: 21 of 2607 cities severely polluted (1%)2026-09-17: 2 of 2607 cities heavily polluted (0%)2026-09-17: 4 of 2607 cities lightly polluted (0%)2026-09-17: 83 of 2607 cities good (3%)2026-09-17: 2497 of 2607 cities excellent (96%)2026-09-18: 18 of 2683 cities severely polluted (1%)2026-09-18: 5 of 2683 cities heavily polluted (0%)2026-09-18: 60 of 2683 cities good (2%)2026-09-18: 2600 of 2683 cities excellent (97%)2026-09-19: 5 of 2685 cities severely polluted (0%)2026-09-19: 4 of 2685 cities heavily polluted (0%)2026-09-19: 7 of 2685 cities lightly polluted (0%)2026-09-19: 91 of 2685 cities good (3%)2026-09-19: 2578 of 2685 cities excellent (96%)2026-09-20: 3 of 2425 cities severely polluted (0%)2026-09-20: 4 of 2425 cities heavily polluted (0%)2026-09-20: 2 of 2425 cities moderately polluted (0%)2026-09-20: 10 of 2425 cities lightly polluted (0%)2026-09-20: 81 of 2425 cities good (3%)2026-09-20: 2325 of 2425 cities excellent (96%)2026-09-21: 23 of 2554 cities severely polluted (1%)2026-09-21: 4 of 2554 cities heavily polluted (0%)2026-09-21: 1 of 2554 cities moderately polluted (0%)2026-09-21: 16 of 2554 cities lightly polluted (1%)2026-09-21: 92 of 2554 cities good (4%)2026-09-21: 2418 of 2554 cities excellent (95%)Sep 212026-09-22: 2 of 2628 cities severely polluted (0%)2026-09-22: 2 of 2628 cities heavily polluted (0%)2026-09-22: 1 of 2628 cities moderately polluted (0%)2026-09-22: 21 of 2628 cities lightly polluted (1%)2026-09-22: 108 of 2628 cities good (4%)2026-09-22: 2494 of 2628 cities excellent (95%)2026-09-23: 1 of 2685 cities heavily polluted (0%)2026-09-23: 25 of 2685 cities lightly polluted (1%)2026-09-23: 90 of 2685 cities good (3%)2026-09-23: 2569 of 2685 cities excellent (96%)2026-09-24: 1 of 2701 cities heavily polluted (0%)2026-09-24: 15 of 2701 cities lightly polluted (1%)2026-09-24: 97 of 2701 cities good (4%)2026-09-24: 2588 of 2701 cities excellent (96%)2026-09-25: 9 of 2659 cities lightly polluted (0%)2026-09-25: 65 of 2659 cities good (2%)2026-09-25: 2585 of 2659 cities excellent (97%)2026-09-26: 5 of 2666 cities lightly polluted (0%)2026-09-26: 60 of 2666 cities good (2%)2026-09-26: 2601 of 2666 cities excellent (98%)2026-09-27: 7 of 2560 cities lightly polluted (0%)2026-09-27: 49 of 2560 cities good (2%)2026-09-27: 2504 of 2560 cities excellent (98%)2026-09-28: 6 of 2638 cities lightly polluted (0%)2026-09-28: 72 of 2638 cities good (3%)2026-09-28: 2560 of 2638 cities excellent (97%)Sep 282026-09-29: 5 of 2681 cities lightly polluted (0%)2026-09-29: 88 of 2681 cities good (3%)2026-09-29: 2588 of 2681 cities excellent (97%)2026-09-30: 4 of 2438 cities lightly polluted (0%)2026-09-30: 29 of 2438 cities good (1%)2026-09-30: 2405 of 2438 cities excellent (99%)2026-10-01: 3 of 1506 cities lightly polluted (0%)2026-10-01: 23 of 1506 cities good (2%)2026-10-01: 1480 of 1506 cities excellent (98%)Oct 1
Each day's ranked cities split by band, worst at the top: a taller red and purple share means a worse day for more of the world, not just one city.

Climbing fastest

Movement shows once the board is a day old.

Cleanest air

Cities with reference monitors only.

What's missing

We rank only cities whose monitor data we're allowed to reuse. The government monitoring networks of China and Turkey publish no terms that allow this, so we leave them out: most cities there are missing here, not clean. The few of their cities that appear are measured by community low-cost sensors, tagged as such. Why.

Use this board

SmogRank, most polluted cities, PM2.5, last 30 days to 2 Oct 2026, 06:00 UTC, smogrank.com/?w=30d.

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Updated 2026-10-02 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the China AQI PM2.5 sub-index.