The world's most polluted cities, ranked

478 of 2,624 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.

#2,594 Marche-en-Famenne 2.7 µg/m³, more polluted than 1% of 2,624
← 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 2,624 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: 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 severe (5%)2026-09-02: 3 of 2651 cities poor (0%)2026-09-02: 4 of 2651 cities moderate (0%)2026-09-02: 87 of 2651 cities satisfactory (3%)2026-09-02: 2431 of 2651 cities good (92%)Sep 22026-09-03: 17 of 2651 cities severe (1%)2026-09-03: 7 of 2651 cities very poor (0%)2026-09-03: 1 of 2651 cities poor (0%)2026-09-03: 7 of 2651 cities moderate (0%)2026-09-03: 91 of 2651 cities satisfactory (3%)2026-09-03: 2528 of 2651 cities good (95%)2026-09-04: 14 of 2653 cities severe (1%)2026-09-04: 3 of 2653 cities very poor (0%)2026-09-04: 13 of 2653 cities moderate (0%)2026-09-04: 79 of 2653 cities satisfactory (3%)2026-09-04: 2544 of 2653 cities good (96%)2026-09-05: 9 of 2663 cities severe (0%)2026-09-05: 5 of 2663 cities very poor (0%)2026-09-05: 1 of 2663 cities poor (0%)2026-09-05: 10 of 2663 cities moderate (0%)2026-09-05: 74 of 2663 cities satisfactory (3%)2026-09-05: 2564 of 2663 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: 82 of 2455 cities satisfactory (3%)2026-09-06: 2349 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: 95 of 2637 cities satisfactory (4%)2026-09-07: 2504 of 2637 cities good (95%)Sep 72026-09-08: 10 of 2604 cities severe (0%)2026-09-08: 4 of 2604 cities very poor (0%)2026-09-08: 1 of 2604 cities poor (0%)2026-09-08: 13 of 2604 cities moderate (0%)2026-09-08: 102 of 2604 cities satisfactory (4%)2026-09-08: 2474 of 2604 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: 101 of 2631 cities satisfactory (4%)2026-09-09: 2479 of 2631 cities good (94%)2026-09-10: 17 of 2585 cities severe (1%)2026-09-10: 5 of 2585 cities very poor (0%)2026-09-10: 3 of 2585 cities poor (0%)2026-09-10: 16 of 2585 cities moderate (1%)2026-09-10: 110 of 2585 cities satisfactory (4%)2026-09-10: 2434 of 2585 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: 100 of 2411 cities satisfactory (4%)2026-09-11: 2270 of 2411 cities good (94%)2026-09-12: 5 of 2461 cities severe (0%)2026-09-12: 1 of 2461 cities very poor (0%)2026-09-12: 3 of 2461 cities poor (0%)2026-09-12: 7 of 2461 cities moderate (0%)2026-09-12: 95 of 2461 cities satisfactory (4%)2026-09-12: 2350 of 2461 cities good (95%)2026-09-13: 4 of 2301 cities severe (0%)2026-09-13: 2 of 2301 cities very poor (0%)2026-09-13: 10 of 2301 cities moderate (0%)2026-09-13: 88 of 2301 cities satisfactory (4%)2026-09-13: 2197 of 2301 cities good (95%)2026-09-14: 14 of 2459 cities severe (1%)2026-09-14: 3 of 2459 cities very poor (0%)2026-09-14: 3 of 2459 cities poor (0%)2026-09-14: 8 of 2459 cities moderate (0%)2026-09-14: 85 of 2459 cities satisfactory (3%)2026-09-14: 2346 of 2459 cities good (95%)Sep 142026-09-15: 16 of 2547 cities severe (1%)2026-09-15: 6 of 2547 cities very poor (0%)2026-09-15: 4 of 2547 cities poor (0%)2026-09-15: 6 of 2547 cities moderate (0%)2026-09-15: 104 of 2547 cities satisfactory (4%)2026-09-15: 2411 of 2547 cities good (95%)2026-09-16: 32 of 2618 cities severe (1%)2026-09-16: 4 of 2618 cities very poor (0%)2026-09-16: 1 of 2618 cities poor (0%)2026-09-16: 14 of 2618 cities moderate (1%)2026-09-16: 116 of 2618 cities satisfactory (4%)2026-09-16: 2451 of 2618 cities good (94%)2026-09-17: 21 of 2610 cities severe (1%)2026-09-17: 2 of 2610 cities very poor (0%)2026-09-17: 2 of 2610 cities poor (0%)2026-09-17: 8 of 2610 cities moderate (0%)2026-09-17: 113 of 2610 cities satisfactory (4%)2026-09-17: 2464 of 2610 cities good (94%)2026-09-18: 18 of 2681 cities severe (1%)2026-09-18: 5 of 2681 cities very poor (0%)2026-09-18: 6 of 2681 cities moderate (0%)2026-09-18: 92 of 2681 cities satisfactory (3%)2026-09-18: 2560 of 2681 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: 99 of 2685 cities satisfactory (4%)2026-09-19: 2552 of 2685 cities good (95%)2026-09-20: 3 of 2432 cities severe (0%)2026-09-20: 6 of 2432 cities very poor (0%)2026-09-20: 2 of 2432 cities poor (0%)2026-09-20: 26 of 2432 cities moderate (1%)2026-09-20: 94 of 2432 cities satisfactory (4%)2026-09-20: 2301 of 2432 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: 109 of 2553 cities satisfactory (4%)2026-09-21: 2385 of 2553 cities good (93%)Sep 212026-09-22: 2 of 2619 cities severe (0%)2026-09-22: 3 of 2619 cities very poor (0%)2026-09-22: 5 of 2619 cities poor (0%)2026-09-22: 30 of 2619 cities moderate (1%)2026-09-22: 113 of 2619 cities satisfactory (4%)2026-09-22: 2466 of 2619 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 2700 cities very poor (0%)2026-09-24: 6 of 2700 cities poor (0%)2026-09-24: 28 of 2700 cities moderate (1%)2026-09-24: 105 of 2700 cities satisfactory (4%)2026-09-24: 2560 of 2700 cities good (95%)2026-09-25: 3 of 2658 cities poor (0%)2026-09-25: 17 of 2658 cities moderate (1%)2026-09-25: 80 of 2658 cities satisfactory (3%)2026-09-25: 2558 of 2658 cities good (96%)2026-09-26: 2 of 2665 cities poor (0%)2026-09-26: 18 of 2665 cities moderate (1%)2026-09-26: 68 of 2665 cities satisfactory (3%)2026-09-26: 2577 of 2665 cities good (97%)2026-09-27: 2 of 2564 cities poor (0%)2026-09-27: 12 of 2564 cities moderate (0%)2026-09-27: 67 of 2564 cities satisfactory (3%)2026-09-27: 2483 of 2564 cities good (97%)2026-09-28: 1 of 2634 cities poor (0%)2026-09-28: 10 of 2634 cities moderate (0%)2026-09-28: 101 of 2634 cities satisfactory (4%)2026-09-28: 2522 of 2634 cities good (96%)Sep 282026-09-29: 1 of 2679 cities poor (0%)2026-09-29: 10 of 2679 cities moderate (0%)2026-09-29: 128 of 2679 cities satisfactory (5%)2026-09-29: 2540 of 2679 cities good (95%)2026-09-30: 1 of 2442 cities poor (0%)2026-09-30: 10 of 2442 cities moderate (0%)2026-09-30: 30 of 2442 cities satisfactory (1%)2026-09-30: 2401 of 2442 cities good (98%)2026-10-01: 1 of 1541 cities poor (0%)2026-10-01: 3 of 1541 cities moderate (0%)2026-10-01: 31 of 1541 cities satisfactory (2%)2026-10-01: 1506 of 1541 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, 05:00 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 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the India AQI PM2.5 sub-index.