The world's most polluted cities, ranked

478 of 2,626 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.

#8 Kosong 171.4 µg/m³, more polluted than 99% of 2,626
← Miryang 307.9 WHO 24-hour guideline
Every ranked city, one column each, worst on the left and cleanest on the right. 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 2,626 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: 49.9 µg/m³, #10Gujranwala2 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 2651 cities severely polluted (5%)2026-09-02: 1 of 2651 cities moderately polluted (0%)2026-09-02: 4 of 2651 cities lightly polluted (0%)2026-09-02: 55 of 2651 cities good (2%)2026-09-02: 2465 of 2651 cities excellent (93%)Sep 22026-09-03: 17 of 2651 cities severely polluted (1%)2026-09-03: 6 of 2651 cities heavily polluted (0%)2026-09-03: 1 of 2651 cities moderately polluted (0%)2026-09-03: 4 of 2651 cities lightly polluted (0%)2026-09-03: 65 of 2651 cities good (2%)2026-09-03: 2558 of 2651 cities excellent (96%)2026-09-04: 14 of 2658 cities severely polluted (1%)2026-09-04: 3 of 2658 cities heavily polluted (0%)2026-09-04: 2 of 2658 cities lightly polluted (0%)2026-09-04: 60 of 2658 cities good (2%)2026-09-04: 2579 of 2658 cities excellent (97%)2026-09-05: 9 of 2665 cities severely polluted (0%)2026-09-05: 5 of 2665 cities heavily polluted (0%)2026-09-05: 4 of 2665 cities lightly polluted (0%)2026-09-05: 44 of 2665 cities good (2%)2026-09-05: 2603 of 2665 cities excellent (98%)2026-09-06: 6 of 2457 cities severely polluted (0%)2026-09-06: 5 of 2457 cities heavily polluted (0%)2026-09-06: 1 of 2457 cities moderately polluted (0%)2026-09-06: 8 of 2457 cities lightly polluted (0%)2026-09-06: 55 of 2457 cities good (2%)2026-09-06: 2382 of 2457 cities excellent (97%)2026-09-07: 19 of 2639 cities severely polluted (1%)2026-09-07: 4 of 2639 cities heavily polluted (0%)2026-09-07: 1 of 2639 cities moderately polluted (0%)2026-09-07: 3 of 2639 cities lightly polluted (0%)2026-09-07: 81 of 2639 cities good (3%)2026-09-07: 2531 of 2639 cities excellent (96%)Sep 72026-09-08: 10 of 2605 cities severely polluted (0%)2026-09-08: 2 of 2605 cities heavily polluted (0%)2026-09-08: 3 of 2605 cities moderately polluted (0%)2026-09-08: 6 of 2605 cities lightly polluted (0%)2026-09-08: 84 of 2605 cities good (3%)2026-09-08: 2500 of 2605 cities excellent (96%)2026-09-09: 23 of 2642 cities severely polluted (1%)2026-09-09: 8 of 2642 cities heavily polluted (0%)2026-09-09: 1 of 2642 cities moderately polluted (0%)2026-09-09: 6 of 2642 cities lightly polluted (0%)2026-09-09: 89 of 2642 cities good (3%)2026-09-09: 2515 of 2642 cities excellent (95%)2026-09-10: 17 of 2582 cities severely polluted (1%)2026-09-10: 5 of 2582 cities heavily polluted (0%)2026-09-10: 7 of 2582 cities lightly polluted (0%)2026-09-10: 92 of 2582 cities good (4%)2026-09-10: 2461 of 2582 cities excellent (95%)2026-09-11: 25 of 2408 cities severely polluted (1%)2026-09-11: 6 of 2408 cities heavily polluted (0%)2026-09-11: 4 of 2408 cities lightly polluted (0%)2026-09-11: 78 of 2408 cities good (3%)2026-09-11: 2295 of 2408 cities excellent (95%)2026-09-12: 5 of 2456 cities severely polluted (0%)2026-09-12: 1 of 2456 cities heavily polluted (0%)2026-09-12: 5 of 2456 cities lightly polluted (0%)2026-09-12: 67 of 2456 cities good (3%)2026-09-12: 2378 of 2456 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: 77 of 2303 cities good (3%)2026-09-13: 2219 of 2303 cities excellent (96%)2026-09-14: 14 of 2454 cities severely polluted (1%)2026-09-14: 3 of 2454 cities heavily polluted (0%)2026-09-14: 1 of 2454 cities moderately polluted (0%)2026-09-14: 5 of 2454 cities lightly polluted (0%)2026-09-14: 64 of 2454 cities good (3%)2026-09-14: 2367 of 2454 cities excellent (96%)Sep 142026-09-15: 16 of 2550 cities severely polluted (1%)2026-09-15: 6 of 2550 cities heavily polluted (0%)2026-09-15: 2 of 2550 cities moderately polluted (0%)2026-09-15: 3 of 2550 cities lightly polluted (0%)2026-09-15: 78 of 2550 cities good (3%)2026-09-15: 2445 of 2550 cities excellent (96%)2026-09-16: 32 of 2626 cities severely polluted (1%)2026-09-16: 3 of 2626 cities heavily polluted (0%)2026-09-16: 1 of 2626 cities moderately polluted (0%)2026-09-16: 6 of 2626 cities lightly polluted (0%)2026-09-16: 91 of 2626 cities good (3%)2026-09-16: 2493 of 2626 cities excellent (95%)2026-09-17: 21 of 2615 cities severely polluted (1%)2026-09-17: 2 of 2615 cities heavily polluted (0%)2026-09-17: 4 of 2615 cities lightly polluted (0%)2026-09-17: 84 of 2615 cities good (3%)2026-09-17: 2504 of 2615 cities excellent (96%)2026-09-18: 18 of 2675 cities severely polluted (1%)2026-09-18: 5 of 2675 cities heavily polluted (0%)2026-09-18: 59 of 2675 cities good (2%)2026-09-18: 2593 of 2675 cities excellent (97%)2026-09-19: 5 of 2680 cities severely polluted (0%)2026-09-19: 4 of 2680 cities heavily polluted (0%)2026-09-19: 7 of 2680 cities lightly polluted (0%)2026-09-19: 91 of 2680 cities good (3%)2026-09-19: 2573 of 2680 cities excellent (96%)2026-09-20: 3 of 2439 cities severely polluted (0%)2026-09-20: 4 of 2439 cities heavily polluted (0%)2026-09-20: 2 of 2439 cities moderately polluted (0%)2026-09-20: 10 of 2439 cities lightly polluted (0%)2026-09-20: 82 of 2439 cities good (3%)2026-09-20: 2338 of 2439 cities excellent (96%)2026-09-21: 23 of 2553 cities severely polluted (1%)2026-09-21: 4 of 2553 cities heavily polluted (0%)2026-09-21: 1 of 2553 cities moderately polluted (0%)2026-09-21: 16 of 2553 cities lightly polluted (1%)2026-09-21: 91 of 2553 cities good (4%)2026-09-21: 2418 of 2553 cities excellent (95%)Sep 212026-09-22: 2 of 2629 cities severely polluted (0%)2026-09-22: 2 of 2629 cities heavily polluted (0%)2026-09-22: 1 of 2629 cities moderately polluted (0%)2026-09-22: 21 of 2629 cities lightly polluted (1%)2026-09-22: 108 of 2629 cities good (4%)2026-09-22: 2495 of 2629 cities excellent (95%)2026-09-23: 1 of 2680 cities heavily polluted (0%)2026-09-23: 25 of 2680 cities lightly polluted (1%)2026-09-23: 91 of 2680 cities good (3%)2026-09-23: 2563 of 2680 cities excellent (96%)2026-09-24: 1 of 2693 cities heavily polluted (0%)2026-09-24: 15 of 2693 cities lightly polluted (1%)2026-09-24: 97 of 2693 cities good (4%)2026-09-24: 2580 of 2693 cities excellent (96%)2026-09-25: 9 of 2657 cities lightly polluted (0%)2026-09-25: 65 of 2657 cities good (2%)2026-09-25: 2583 of 2657 cities excellent (97%)2026-09-26: 5 of 2668 cities lightly polluted (0%)2026-09-26: 60 of 2668 cities good (2%)2026-09-26: 2603 of 2668 cities excellent (98%)2026-09-27: 7 of 2565 cities lightly polluted (0%)2026-09-27: 49 of 2565 cities good (2%)2026-09-27: 2509 of 2565 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 2670 cities lightly polluted (0%)2026-09-29: 88 of 2670 cities good (3%)2026-09-29: 2577 of 2670 cities excellent (97%)2026-09-30: 4 of 2477 cities lightly polluted (0%)2026-09-30: 29 of 2477 cities good (1%)2026-09-30: 2444 of 2477 cities excellent (99%)2026-10-01: 3 of 1586 cities lightly polluted (0%)2026-10-01: 23 of 1586 cities good (1%)2026-10-01: 1560 of 1586 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, 04:00 UTC, smogrank.com/?w=30d.

Download top 10 (PNG)

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

Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the China AQI PM2.5 sub-index.