The world's most polluted cities, ranked

478 of 2,622 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.

#337 Thabazimbi 22.5 µg/m³, more polluted than 87% of 2,622
← 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 2,622 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 2638 cities severe (5%)2026-09-02: 3 of 2638 cities poor (0%)2026-09-02: 4 of 2638 cities moderate (0%)2026-09-02: 85 of 2638 cities satisfactory (3%)2026-09-02: 2420 of 2638 cities good (92%)Sep 22026-09-03: 17 of 2661 cities severe (1%)2026-09-03: 7 of 2661 cities very poor (0%)2026-09-03: 1 of 2661 cities poor (0%)2026-09-03: 7 of 2661 cities moderate (0%)2026-09-03: 91 of 2661 cities satisfactory (3%)2026-09-03: 2538 of 2661 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 2665 cities severe (0%)2026-09-05: 5 of 2665 cities very poor (0%)2026-09-05: 1 of 2665 cities poor (0%)2026-09-05: 10 of 2665 cities moderate (0%)2026-09-05: 74 of 2665 cities satisfactory (3%)2026-09-05: 2566 of 2665 cities good (96%)2026-09-06: 6 of 2454 cities severe (0%)2026-09-06: 5 of 2454 cities very poor (0%)2026-09-06: 6 of 2454 cities poor (0%)2026-09-06: 7 of 2454 cities moderate (0%)2026-09-06: 81 of 2454 cities satisfactory (3%)2026-09-06: 2349 of 2454 cities good (96%)2026-09-07: 19 of 2634 cities severe (1%)2026-09-07: 5 of 2634 cities very poor (0%)2026-09-07: 2 of 2634 cities poor (0%)2026-09-07: 12 of 2634 cities moderate (0%)2026-09-07: 97 of 2634 cities satisfactory (4%)2026-09-07: 2499 of 2634 cities good (95%)Sep 72026-09-08: 10 of 2595 cities severe (0%)2026-09-08: 4 of 2595 cities very poor (0%)2026-09-08: 1 of 2595 cities poor (0%)2026-09-08: 13 of 2595 cities moderate (1%)2026-09-08: 102 of 2595 cities satisfactory (4%)2026-09-08: 2465 of 2595 cities good (95%)2026-09-09: 23 of 2629 cities severe (1%)2026-09-09: 9 of 2629 cities very poor (0%)2026-09-09: 4 of 2629 cities poor (0%)2026-09-09: 15 of 2629 cities moderate (1%)2026-09-09: 99 of 2629 cities satisfactory (4%)2026-09-09: 2479 of 2629 cities good (94%)2026-09-10: 17 of 2575 cities severe (1%)2026-09-10: 5 of 2575 cities very poor (0%)2026-09-10: 3 of 2575 cities poor (0%)2026-09-10: 16 of 2575 cities moderate (1%)2026-09-10: 110 of 2575 cities satisfactory (4%)2026-09-10: 2424 of 2575 cities good (94%)2026-09-11: 25 of 2408 cities severe (1%)2026-09-11: 6 of 2408 cities very poor (0%)2026-09-11: 1 of 2408 cities poor (0%)2026-09-11: 9 of 2408 cities moderate (0%)2026-09-11: 102 of 2408 cities satisfactory (4%)2026-09-11: 2265 of 2408 cities good (94%)2026-09-12: 5 of 2483 cities severe (0%)2026-09-12: 1 of 2483 cities very poor (0%)2026-09-12: 3 of 2483 cities poor (0%)2026-09-12: 7 of 2483 cities moderate (0%)2026-09-12: 94 of 2483 cities satisfactory (4%)2026-09-12: 2373 of 2483 cities good (96%)2026-09-13: 4 of 2299 cities severe (0%)2026-09-13: 2 of 2299 cities very poor (0%)2026-09-13: 10 of 2299 cities moderate (0%)2026-09-13: 87 of 2299 cities satisfactory (4%)2026-09-13: 2196 of 2299 cities good (96%)2026-09-14: 14 of 2453 cities severe (1%)2026-09-14: 3 of 2453 cities very poor (0%)2026-09-14: 3 of 2453 cities poor (0%)2026-09-14: 8 of 2453 cities moderate (0%)2026-09-14: 85 of 2453 cities satisfactory (3%)2026-09-14: 2340 of 2453 cities good (95%)Sep 142026-09-15: 16 of 2548 cities severe (1%)2026-09-15: 6 of 2548 cities very poor (0%)2026-09-15: 4 of 2548 cities poor (0%)2026-09-15: 6 of 2548 cities moderate (0%)2026-09-15: 105 of 2548 cities satisfactory (4%)2026-09-15: 2411 of 2548 cities good (95%)2026-09-16: 32 of 2623 cities severe (1%)2026-09-16: 4 of 2623 cities very poor (0%)2026-09-16: 1 of 2623 cities poor (0%)2026-09-16: 14 of 2623 cities moderate (1%)2026-09-16: 118 of 2623 cities satisfactory (4%)2026-09-16: 2454 of 2623 cities good (94%)2026-09-17: 21 of 2605 cities severe (1%)2026-09-17: 2 of 2605 cities very poor (0%)2026-09-17: 2 of 2605 cities poor (0%)2026-09-17: 8 of 2605 cities moderate (0%)2026-09-17: 110 of 2605 cities satisfactory (4%)2026-09-17: 2462 of 2605 cities good (95%)2026-09-18: 18 of 2687 cities severe (1%)2026-09-18: 5 of 2687 cities very poor (0%)2026-09-18: 7 of 2687 cities moderate (0%)2026-09-18: 93 of 2687 cities satisfactory (3%)2026-09-18: 2564 of 2687 cities good (95%)2026-09-19: 5 of 2687 cities severe (0%)2026-09-19: 4 of 2687 cities very poor (0%)2026-09-19: 1 of 2687 cities poor (0%)2026-09-19: 24 of 2687 cities moderate (1%)2026-09-19: 98 of 2687 cities satisfactory (4%)2026-09-19: 2555 of 2687 cities good (95%)2026-09-20: 3 of 2423 cities severe (0%)2026-09-20: 6 of 2423 cities very poor (0%)2026-09-20: 2 of 2423 cities poor (0%)2026-09-20: 25 of 2423 cities moderate (1%)2026-09-20: 94 of 2423 cities satisfactory (4%)2026-09-20: 2293 of 2423 cities good (95%)2026-09-21: 23 of 2553 cities severe (1%)2026-09-21: 5 of 2553 cities very poor (0%)2026-09-21: 6 of 2553 cities poor (0%)2026-09-21: 25 of 2553 cities moderate (1%)2026-09-21: 110 of 2553 cities satisfactory (4%)2026-09-21: 2384 of 2553 cities good (93%)Sep 212026-09-22: 2 of 2629 cities severe (0%)2026-09-22: 3 of 2629 cities very poor (0%)2026-09-22: 5 of 2629 cities poor (0%)2026-09-22: 30 of 2629 cities moderate (1%)2026-09-22: 114 of 2629 cities satisfactory (4%)2026-09-22: 2475 of 2629 cities good (94%)2026-09-23: 1 of 2686 cities very poor (0%)2026-09-23: 10 of 2686 cities poor (0%)2026-09-23: 30 of 2686 cities moderate (1%)2026-09-23: 102 of 2686 cities satisfactory (4%)2026-09-23: 2543 of 2686 cities good (95%)2026-09-24: 1 of 2702 cities very poor (0%)2026-09-24: 6 of 2702 cities poor (0%)2026-09-24: 28 of 2702 cities moderate (1%)2026-09-24: 105 of 2702 cities satisfactory (4%)2026-09-24: 2562 of 2702 cities good (95%)2026-09-25: 3 of 2660 cities poor (0%)2026-09-25: 17 of 2660 cities moderate (1%)2026-09-25: 79 of 2660 cities satisfactory (3%)2026-09-25: 2561 of 2660 cities good (96%)2026-09-26: 2 of 2667 cities poor (0%)2026-09-26: 18 of 2667 cities moderate (1%)2026-09-26: 69 of 2667 cities satisfactory (3%)2026-09-26: 2578 of 2667 cities good (97%)2026-09-27: 2 of 2558 cities poor (0%)2026-09-27: 12 of 2558 cities moderate (0%)2026-09-27: 66 of 2558 cities satisfactory (3%)2026-09-27: 2478 of 2558 cities good (97%)2026-09-28: 1 of 2637 cities poor (0%)2026-09-28: 10 of 2637 cities moderate (0%)2026-09-28: 103 of 2637 cities satisfactory (4%)2026-09-28: 2523 of 2637 cities good (96%)Sep 282026-09-29: 1 of 2672 cities poor (0%)2026-09-29: 10 of 2672 cities moderate (0%)2026-09-29: 127 of 2672 cities satisfactory (5%)2026-09-29: 2534 of 2672 cities good (95%)2026-09-30: 1 of 2422 cities poor (0%)2026-09-30: 10 of 2422 cities moderate (0%)2026-09-30: 30 of 2422 cities satisfactory (1%)2026-09-30: 2381 of 2422 cities good (98%)2026-10-01: 1 of 1464 cities poor (0%)2026-10-01: 3 of 1464 cities moderate (0%)2026-10-01: 31 of 1464 cities satisfactory (2%)2026-10-01: 1429 of 1464 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, 07:00 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 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the India AQI PM2.5 sub-index.