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.

#30 Hwawŏn 106.3 µg/m³, more polluted than 98% 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 400+
  2. 2HwasunJeollanam-do, South Korea 400+
  3. 3NangenJeollabuk-do, South Korea 399
  4. 4SeosanChungcheongnam-do, South Korea 381
  5. 5GaigeturiJeju-do, South Korea 358
  6. 6Hwaseong-siGyeonggi-do, South Korea 349
  7. 7Taesal-liChungcheongnam-do, South Korea 344
  8. 8KosongGangwon-do, South Korea 339
  9. 9SeogwipoJeju-do, South Korea 338
  10. 10AnseongGyeonggi-do, South Korea 335
  11. 11SinhyeonGyeongsangnam-do, South Korea 318
  12. 12NonsanChungcheongnam-do, South Korea 313
  13. 13ChangsuJeollabuk-do, South Korea 307
  14. 14MokpoJeollanam-do, South Korea 306
  15. 15KimjeJeollabuk-do, South Korea 306
  16. 16JeongeupJeollabuk-do, South Korea 305
  17. 17HadongGyeongsangnam-do, South Korea 304
  18. 18Yangp'yŏngGyeonggi-do, South Korea 304
  19. 19CheorwonGangwon-do, South Korea 303
  20. 20KunwiGyeongsangbuk-do, South Korea 303
  21. 21GeojeGyeongsangnam-do, South Korea 280
  22. 22ChinjuGyeongsangnam-do, South Korea 276
  23. 23YesanChungcheongnam-do, South Korea 269
  24. 24PubalGyeonggi-do, South Korea 269
  25. 25BuanJeollabuk-do, South Korea 269
  26. 26YeojuGyeonggi-do, South Korea 266
  27. 27YŏnmuChungcheongnam-do, South Korea 262
  28. 28NamsaJeollabuk-do, South Korea 259
  29. 29YangsanGyeongsangnam-do, South Korea 256
  30. 30BuyeoChungcheongnam-do, South Korea 252
  31. 30HwawŏnDaegu, South Korea 252
  32. 32GunsanJeollabuk-do, South Korea 242
  33. 33TangjinChungcheongnam-do, South Korea 235
  34. 34GangneungGangwon-do, South Korea 228
  35. 35Cheongju-siNorth Chungcheong, South Korea 221
  36. 36YeonggwangJeollanam-do, South Korea 218
  37. 37YecheonGyeongsangbuk-do, South Korea 218
  38. 38JungpyongNorth Chungcheong, South Korea 215
  39. 39Ganghwa-gunIncheon, South Korea 215
  40. 40KoesanNorth Chungcheong, South Korea 215
  41. 41GoseongGyeongsangnam-do, South Korea 215
  42. 42YeongdongNorth Chungcheong, South Korea 215
  43. 42YangjuGyeonggi-do, South Korea 215
  44. 42BoryeongChungcheongnam-do, South Korea 215
  45. 45JangheungJeollanam-do, South Korea 204
  46. 46Jeju CityJeju-do, South Korea 204
  47. 47Koch'angJeollabuk-do, South Korea 201
  48. 48Icheon-siGyeonggi-do, South Korea 201
  49. 49MuanJeollanam-do, South Korea 200
  50. 50HongseongChungcheongnam-do, South Korea 197
All 2,623 cities
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+

India's National Air Quality Index (CPCB), PM2.5 sub-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 severe (5%)2026-09-02: 3 of 2649 cities poor (0%)2026-09-02: 4 of 2649 cities moderate (0%)2026-09-02: 85 of 2649 cities satisfactory (3%)2026-09-02: 2431 of 2649 cities good (92%)Sep 22026-09-03: 17 of 2653 cities severe (1%)2026-09-03: 7 of 2653 cities very poor (0%)2026-09-03: 1 of 2653 cities poor (0%)2026-09-03: 7 of 2653 cities moderate (0%)2026-09-03: 91 of 2653 cities satisfactory (3%)2026-09-03: 2530 of 2653 cities good (95%)2026-09-04: 14 of 2654 cities severe (1%)2026-09-04: 3 of 2654 cities very poor (0%)2026-09-04: 13 of 2654 cities moderate (0%)2026-09-04: 80 of 2654 cities satisfactory (3%)2026-09-04: 2544 of 2654 cities good (96%)2026-09-05: 9 of 2662 cities severe (0%)2026-09-05: 5 of 2662 cities very poor (0%)2026-09-05: 1 of 2662 cities poor (0%)2026-09-05: 10 of 2662 cities moderate (0%)2026-09-05: 74 of 2662 cities satisfactory (3%)2026-09-05: 2563 of 2662 cities good (96%)2026-09-06: 6 of 2455 cities severe (0%)2026-09-06: 5 of 2455 cities very poor (0%)2026-09-06: 6 of 2455 cities poor (0%)2026-09-06: 7 of 2455 cities moderate (0%)2026-09-06: 81 of 2455 cities satisfactory (3%)2026-09-06: 2350 of 2455 cities good (96%)2026-09-07: 19 of 2637 cities severe (1%)2026-09-07: 5 of 2637 cities very poor (0%)2026-09-07: 2 of 2637 cities poor (0%)2026-09-07: 12 of 2637 cities moderate (0%)2026-09-07: 96 of 2637 cities satisfactory (4%)2026-09-07: 2503 of 2637 cities good (95%)Sep 72026-09-08: 10 of 2600 cities severe (0%)2026-09-08: 4 of 2600 cities very poor (0%)2026-09-08: 1 of 2600 cities poor (0%)2026-09-08: 13 of 2600 cities moderate (1%)2026-09-08: 102 of 2600 cities satisfactory (4%)2026-09-08: 2470 of 2600 cities good (95%)2026-09-09: 23 of 2631 cities severe (1%)2026-09-09: 9 of 2631 cities very poor (0%)2026-09-09: 4 of 2631 cities poor (0%)2026-09-09: 15 of 2631 cities moderate (1%)2026-09-09: 100 of 2631 cities satisfactory (4%)2026-09-09: 2480 of 2631 cities good (94%)2026-09-10: 17 of 2579 cities severe (1%)2026-09-10: 5 of 2579 cities very poor (0%)2026-09-10: 3 of 2579 cities poor (0%)2026-09-10: 16 of 2579 cities moderate (1%)2026-09-10: 110 of 2579 cities satisfactory (4%)2026-09-10: 2428 of 2579 cities good (94%)2026-09-11: 25 of 2411 cities severe (1%)2026-09-11: 6 of 2411 cities very poor (0%)2026-09-11: 1 of 2411 cities poor (0%)2026-09-11: 9 of 2411 cities moderate (0%)2026-09-11: 102 of 2411 cities satisfactory (4%)2026-09-11: 2268 of 2411 cities good (94%)2026-09-12: 5 of 2468 cities severe (0%)2026-09-12: 1 of 2468 cities very poor (0%)2026-09-12: 3 of 2468 cities poor (0%)2026-09-12: 7 of 2468 cities moderate (0%)2026-09-12: 94 of 2468 cities satisfactory (4%)2026-09-12: 2358 of 2468 cities good (96%)2026-09-13: 4 of 2303 cities severe (0%)2026-09-13: 2 of 2303 cities very poor (0%)2026-09-13: 10 of 2303 cities moderate (0%)2026-09-13: 87 of 2303 cities satisfactory (4%)2026-09-13: 2200 of 2303 cities good (96%)2026-09-14: 14 of 2455 cities severe (1%)2026-09-14: 3 of 2455 cities very poor (0%)2026-09-14: 3 of 2455 cities poor (0%)2026-09-14: 8 of 2455 cities moderate (0%)2026-09-14: 85 of 2455 cities satisfactory (3%)2026-09-14: 2342 of 2455 cities good (95%)Sep 142026-09-15: 16 of 2545 cities severe (1%)2026-09-15: 6 of 2545 cities very poor (0%)2026-09-15: 4 of 2545 cities poor (0%)2026-09-15: 6 of 2545 cities moderate (0%)2026-09-15: 105 of 2545 cities satisfactory (4%)2026-09-15: 2408 of 2545 cities good (95%)2026-09-16: 32 of 2624 cities severe (1%)2026-09-16: 4 of 2624 cities very poor (0%)2026-09-16: 1 of 2624 cities poor (0%)2026-09-16: 14 of 2624 cities moderate (1%)2026-09-16: 118 of 2624 cities satisfactory (4%)2026-09-16: 2455 of 2624 cities good (94%)2026-09-17: 21 of 2607 cities severe (1%)2026-09-17: 2 of 2607 cities very poor (0%)2026-09-17: 2 of 2607 cities poor (0%)2026-09-17: 8 of 2607 cities moderate (0%)2026-09-17: 110 of 2607 cities satisfactory (4%)2026-09-17: 2464 of 2607 cities good (95%)2026-09-18: 18 of 2683 cities severe (1%)2026-09-18: 5 of 2683 cities very poor (0%)2026-09-18: 7 of 2683 cities moderate (0%)2026-09-18: 93 of 2683 cities satisfactory (3%)2026-09-18: 2560 of 2683 cities good (95%)2026-09-19: 5 of 2685 cities severe (0%)2026-09-19: 4 of 2685 cities very poor (0%)2026-09-19: 1 of 2685 cities poor (0%)2026-09-19: 24 of 2685 cities moderate (1%)2026-09-19: 98 of 2685 cities satisfactory (4%)2026-09-19: 2553 of 2685 cities good (95%)2026-09-20: 3 of 2425 cities severe (0%)2026-09-20: 6 of 2425 cities very poor (0%)2026-09-20: 2 of 2425 cities poor (0%)2026-09-20: 25 of 2425 cities moderate (1%)2026-09-20: 94 of 2425 cities satisfactory (4%)2026-09-20: 2295 of 2425 cities good (95%)2026-09-21: 23 of 2554 cities severe (1%)2026-09-21: 5 of 2554 cities very poor (0%)2026-09-21: 6 of 2554 cities poor (0%)2026-09-21: 25 of 2554 cities moderate (1%)2026-09-21: 110 of 2554 cities satisfactory (4%)2026-09-21: 2385 of 2554 cities good (93%)Sep 212026-09-22: 2 of 2628 cities severe (0%)2026-09-22: 3 of 2628 cities very poor (0%)2026-09-22: 5 of 2628 cities poor (0%)2026-09-22: 30 of 2628 cities moderate (1%)2026-09-22: 113 of 2628 cities satisfactory (4%)2026-09-22: 2475 of 2628 cities good (94%)2026-09-23: 1 of 2685 cities very poor (0%)2026-09-23: 10 of 2685 cities poor (0%)2026-09-23: 30 of 2685 cities moderate (1%)2026-09-23: 103 of 2685 cities satisfactory (4%)2026-09-23: 2541 of 2685 cities good (95%)2026-09-24: 1 of 2701 cities very poor (0%)2026-09-24: 6 of 2701 cities poor (0%)2026-09-24: 28 of 2701 cities moderate (1%)2026-09-24: 104 of 2701 cities satisfactory (4%)2026-09-24: 2562 of 2701 cities good (95%)2026-09-25: 3 of 2659 cities poor (0%)2026-09-25: 17 of 2659 cities moderate (1%)2026-09-25: 80 of 2659 cities satisfactory (3%)2026-09-25: 2559 of 2659 cities good (96%)2026-09-26: 2 of 2666 cities poor (0%)2026-09-26: 18 of 2666 cities moderate (1%)2026-09-26: 68 of 2666 cities satisfactory (3%)2026-09-26: 2578 of 2666 cities good (97%)2026-09-27: 2 of 2560 cities poor (0%)2026-09-27: 12 of 2560 cities moderate (0%)2026-09-27: 67 of 2560 cities satisfactory (3%)2026-09-27: 2479 of 2560 cities good (97%)2026-09-28: 1 of 2638 cities poor (0%)2026-09-28: 10 of 2638 cities moderate (0%)2026-09-28: 102 of 2638 cities satisfactory (4%)2026-09-28: 2525 of 2638 cities good (96%)Sep 282026-09-29: 1 of 2681 cities poor (0%)2026-09-29: 10 of 2681 cities moderate (0%)2026-09-29: 128 of 2681 cities satisfactory (5%)2026-09-29: 2542 of 2681 cities good (95%)2026-09-30: 1 of 2438 cities poor (0%)2026-09-30: 10 of 2438 cities moderate (0%)2026-09-30: 30 of 2438 cities satisfactory (1%)2026-09-30: 2397 of 2438 cities good (98%)2026-10-01: 1 of 1506 cities poor (0%)2026-10-01: 3 of 1506 cities moderate (0%)2026-10-01: 31 of 1506 cities satisfactory (2%)2026-10-01: 1471 of 1506 cities good (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.

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