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.

#59 Boseong 79.6 µg/m³, more polluted than 97% 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 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 2,626 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 2658 cities severe (1%)2026-09-04: 3 of 2658 cities very poor (0%)2026-09-04: 13 of 2658 cities moderate (0%)2026-09-04: 79 of 2658 cities satisfactory (3%)2026-09-04: 2549 of 2658 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 2457 cities severe (0%)2026-09-06: 5 of 2457 cities very poor (0%)2026-09-06: 6 of 2457 cities poor (0%)2026-09-06: 7 of 2457 cities moderate (0%)2026-09-06: 82 of 2457 cities satisfactory (3%)2026-09-06: 2351 of 2457 cities good (96%)2026-09-07: 19 of 2639 cities severe (1%)2026-09-07: 5 of 2639 cities very poor (0%)2026-09-07: 2 of 2639 cities poor (0%)2026-09-07: 12 of 2639 cities moderate (0%)2026-09-07: 95 of 2639 cities satisfactory (4%)2026-09-07: 2506 of 2639 cities good (95%)Sep 72026-09-08: 10 of 2605 cities severe (0%)2026-09-08: 4 of 2605 cities very poor (0%)2026-09-08: 1 of 2605 cities poor (0%)2026-09-08: 13 of 2605 cities moderate (0%)2026-09-08: 102 of 2605 cities satisfactory (4%)2026-09-08: 2475 of 2605 cities good (95%)2026-09-09: 23 of 2642 cities severe (1%)2026-09-09: 9 of 2642 cities very poor (0%)2026-09-09: 4 of 2642 cities poor (0%)2026-09-09: 15 of 2642 cities moderate (1%)2026-09-09: 101 of 2642 cities satisfactory (4%)2026-09-09: 2490 of 2642 cities good (94%)2026-09-10: 17 of 2582 cities severe (1%)2026-09-10: 5 of 2582 cities very poor (0%)2026-09-10: 3 of 2582 cities poor (0%)2026-09-10: 16 of 2582 cities moderate (1%)2026-09-10: 110 of 2582 cities satisfactory (4%)2026-09-10: 2431 of 2582 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: 100 of 2408 cities satisfactory (4%)2026-09-11: 2267 of 2408 cities good (94%)2026-09-12: 5 of 2456 cities severe (0%)2026-09-12: 1 of 2456 cities very poor (0%)2026-09-12: 3 of 2456 cities poor (0%)2026-09-12: 7 of 2456 cities moderate (0%)2026-09-12: 95 of 2456 cities satisfactory (4%)2026-09-12: 2345 of 2456 cities good (95%)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: 88 of 2303 cities satisfactory (4%)2026-09-13: 2199 of 2303 cities good (95%)2026-09-14: 14 of 2454 cities severe (1%)2026-09-14: 3 of 2454 cities very poor (0%)2026-09-14: 3 of 2454 cities poor (0%)2026-09-14: 8 of 2454 cities moderate (0%)2026-09-14: 85 of 2454 cities satisfactory (3%)2026-09-14: 2341 of 2454 cities good (95%)Sep 142026-09-15: 16 of 2550 cities severe (1%)2026-09-15: 6 of 2550 cities very poor (0%)2026-09-15: 4 of 2550 cities poor (0%)2026-09-15: 6 of 2550 cities moderate (0%)2026-09-15: 102 of 2550 cities satisfactory (4%)2026-09-15: 2416 of 2550 cities good (95%)2026-09-16: 32 of 2626 cities severe (1%)2026-09-16: 4 of 2626 cities very poor (0%)2026-09-16: 1 of 2626 cities poor (0%)2026-09-16: 14 of 2626 cities moderate (1%)2026-09-16: 118 of 2626 cities satisfactory (4%)2026-09-16: 2457 of 2626 cities good (94%)2026-09-17: 21 of 2615 cities severe (1%)2026-09-17: 2 of 2615 cities very poor (0%)2026-09-17: 2 of 2615 cities poor (0%)2026-09-17: 8 of 2615 cities moderate (0%)2026-09-17: 113 of 2615 cities satisfactory (4%)2026-09-17: 2469 of 2615 cities good (94%)2026-09-18: 18 of 2675 cities severe (1%)2026-09-18: 5 of 2675 cities very poor (0%)2026-09-18: 6 of 2675 cities moderate (0%)2026-09-18: 92 of 2675 cities satisfactory (3%)2026-09-18: 2554 of 2675 cities good (95%)2026-09-19: 5 of 2680 cities severe (0%)2026-09-19: 4 of 2680 cities very poor (0%)2026-09-19: 1 of 2680 cities poor (0%)2026-09-19: 24 of 2680 cities moderate (1%)2026-09-19: 99 of 2680 cities satisfactory (4%)2026-09-19: 2547 of 2680 cities good (95%)2026-09-20: 3 of 2439 cities severe (0%)2026-09-20: 6 of 2439 cities very poor (0%)2026-09-20: 2 of 2439 cities poor (0%)2026-09-20: 26 of 2439 cities moderate (1%)2026-09-20: 94 of 2439 cities satisfactory (4%)2026-09-20: 2308 of 2439 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 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: 113 of 2629 cities satisfactory (4%)2026-09-22: 2476 of 2629 cities good (94%)2026-09-23: 1 of 2680 cities very poor (0%)2026-09-23: 10 of 2680 cities poor (0%)2026-09-23: 30 of 2680 cities moderate (1%)2026-09-23: 103 of 2680 cities satisfactory (4%)2026-09-23: 2536 of 2680 cities good (95%)2026-09-24: 1 of 2693 cities very poor (0%)2026-09-24: 6 of 2693 cities poor (0%)2026-09-24: 28 of 2693 cities moderate (1%)2026-09-24: 105 of 2693 cities satisfactory (4%)2026-09-24: 2553 of 2693 cities good (95%)2026-09-25: 3 of 2657 cities poor (0%)2026-09-25: 17 of 2657 cities moderate (1%)2026-09-25: 80 of 2657 cities satisfactory (3%)2026-09-25: 2557 of 2657 cities good (96%)2026-09-26: 2 of 2668 cities poor (0%)2026-09-26: 18 of 2668 cities moderate (1%)2026-09-26: 68 of 2668 cities satisfactory (3%)2026-09-26: 2580 of 2668 cities good (97%)2026-09-27: 2 of 2565 cities poor (0%)2026-09-27: 12 of 2565 cities moderate (0%)2026-09-27: 67 of 2565 cities satisfactory (3%)2026-09-27: 2484 of 2565 cities good (97%)2026-09-28: 1 of 2638 cities poor (0%)2026-09-28: 10 of 2638 cities moderate (0%)2026-09-28: 101 of 2638 cities satisfactory (4%)2026-09-28: 2526 of 2638 cities good (96%)Sep 282026-09-29: 1 of 2670 cities poor (0%)2026-09-29: 10 of 2670 cities moderate (0%)2026-09-29: 128 of 2670 cities satisfactory (5%)2026-09-29: 2531 of 2670 cities good (95%)2026-09-30: 1 of 2477 cities poor (0%)2026-09-30: 10 of 2477 cities moderate (0%)2026-09-30: 30 of 2477 cities satisfactory (1%)2026-09-30: 2436 of 2477 cities good (98%)2026-10-01: 1 of 1586 cities poor (0%)2026-10-01: 3 of 1586 cities moderate (0%)2026-10-01: 31 of 1586 cities satisfactory (2%)2026-10-01: 1551 of 1586 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, 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 India AQI PM2.5 sub-index.