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.

#28 Namsa 108.3 µg/m³, more polluted than 98% of 2,624
← 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 307.9
  2. 2HwasunJeollanam-do, South Korea 287.9
  3. 3NangenJeollabuk-do, South Korea 248.9
  4. 4SeosanChungcheongnam-do, South Korea 224.6
  5. 5GaigeturiJeju-do, South Korea 195.2
  6. 6Hwaseong-siGyeonggi-do, South Korea 182.7
  7. 7Taesal-liChungcheongnam-do, South Korea 176.6
  8. 8KosongGangwon-do, South Korea 171.4
  9. 9SeogwipoJeju-do, South Korea 168.9
  10. 10AnseongGyeonggi-do, South Korea 165.3
  11. 11SinhyeonGyeongsangnam-do, South Korea 143.3
  12. 12NonsanChungcheongnam-do, South Korea 135.7
  13. 13ChangsuJeollabuk-do, South Korea 128.5
  14. 14MokpoJeollanam-do, South Korea 127.0
  15. 15KimjeJeollabuk-do, South Korea 126.8
  16. 16JeongeupJeollabuk-do, South Korea 125.8
  17. 17HadongGyeongsangnam-do, South Korea 125.3
  18. 18Yangp'yŏngGyeonggi-do, South Korea 124.8
  19. 19CheorwonGangwon-do, South Korea 124.1
  20. 20KunwiGyeongsangbuk-do, South Korea 123.1
  21. 21GeojeGyeongsangnam-do, South Korea 114.3
  22. 22ChinjuGyeongsangnam-do, South Korea 112.5
  23. 23YesanChungcheongnam-do, South Korea 111.3
  24. 24PubalGyeonggi-do, South Korea 110.8
  25. 25BuanJeollabuk-do, South Korea 110.5
  26. 26YeojuGyeonggi-do, South Korea 110.3
  27. 27YŏnmuChungcheongnam-do, South Korea 108.8
  28. 28NamsaJeollabuk-do, South Korea 108.3
  29. 29YangsanGyeongsangnam-do, South Korea 107.0
  30. 30BuyeoChungcheongnam-do, South Korea 106.3
  31. 30HwawŏnDaegu, South Korea 106.3
  32. 32GunsanJeollabuk-do, South Korea 103.3
  33. 33TangjinChungcheongnam-do, South Korea 101.0
  34. 34GangneungGangwon-do, South Korea 99.0
  35. 35Cheongju-siNorth Chungcheong, South Korea 97.1
  36. 36YeonggwangJeollanam-do, South Korea 96.2
  37. 37YecheonGyeongsangbuk-do, South Korea 95.5
  38. 38JungpyongNorth Chungcheong, South Korea 95.3
  39. 39Ganghwa-gunIncheon, South Korea 95.2
  40. 40KoesanNorth Chungcheong, South Korea 95.1
  41. 41GoseongGyeongsangnam-do, South Korea 95.0
  42. 42YeongdongNorth Chungcheong, South Korea 94.9
  43. 42YangjuGyeonggi-do, South Korea 94.9
  44. 42BoryeongChungcheongnam-do, South Korea 94.9
  45. 45JangheungJeollanam-do, South Korea 92.0
  46. 46Jeju CityJeju-do, South Korea 91.9
  47. 47Koch'angJeollabuk-do, South Korea 90.6
  48. 48Icheon-siGyeonggi-do, South Korea 90.5
  49. 49MuanJeollanam-do, South Korea 89.6
  50. 50HongseongChungcheongnam-do, South Korea 89.3
All 2,624 cities
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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 extremely poor (5%)2026-09-02: 3 of 2651 cities very poor (0%)2026-09-02: 15 of 2651 cities poor (1%)2026-09-02: 310 of 2651 cities moderate (12%)2026-09-02: 1316 of 2651 cities fair (50%)2026-09-02: 881 of 2651 cities good (33%)Sep 22026-09-03: 23 of 2651 cities extremely poor (1%)2026-09-03: 2 of 2651 cities very poor (0%)2026-09-03: 20 of 2651 cities poor (1%)2026-09-03: 297 of 2651 cities moderate (11%)2026-09-03: 1270 of 2651 cities fair (48%)2026-09-03: 1039 of 2651 cities good (39%)2026-09-04: 17 of 2653 cities extremely poor (1%)2026-09-04: 24 of 2653 cities poor (1%)2026-09-04: 311 of 2653 cities moderate (12%)2026-09-04: 1036 of 2653 cities fair (39%)2026-09-04: 1265 of 2653 cities good (48%)2026-09-05: 14 of 2663 cities extremely poor (1%)2026-09-05: 1 of 2663 cities very poor (0%)2026-09-05: 19 of 2663 cities poor (1%)2026-09-05: 327 of 2663 cities moderate (12%)2026-09-05: 992 of 2663 cities fair (37%)2026-09-05: 1310 of 2663 cities good (49%)2026-09-06: 11 of 2455 cities extremely poor (0%)2026-09-06: 6 of 2455 cities very poor (0%)2026-09-06: 16 of 2455 cities poor (1%)2026-09-06: 286 of 2455 cities moderate (12%)2026-09-06: 1059 of 2455 cities fair (43%)2026-09-06: 1077 of 2455 cities good (44%)2026-09-07: 23 of 2637 cities extremely poor (1%)2026-09-07: 3 of 2637 cities very poor (0%)2026-09-07: 28 of 2637 cities poor (1%)2026-09-07: 300 of 2637 cities moderate (11%)2026-09-07: 1092 of 2637 cities fair (41%)2026-09-07: 1191 of 2637 cities good (45%)Sep 72026-09-08: 12 of 2604 cities extremely poor (0%)2026-09-08: 3 of 2604 cities very poor (0%)2026-09-08: 34 of 2604 cities poor (1%)2026-09-08: 319 of 2604 cities moderate (12%)2026-09-08: 1295 of 2604 cities fair (50%)2026-09-08: 941 of 2604 cities good (36%)2026-09-09: 32 of 2631 cities extremely poor (1%)2026-09-09: 4 of 2631 cities very poor (0%)2026-09-09: 34 of 2631 cities poor (1%)2026-09-09: 316 of 2631 cities moderate (12%)2026-09-09: 1069 of 2631 cities fair (41%)2026-09-09: 1176 of 2631 cities good (45%)2026-09-10: 22 of 2585 cities extremely poor (1%)2026-09-10: 3 of 2585 cities very poor (0%)2026-09-10: 27 of 2585 cities poor (1%)2026-09-10: 324 of 2585 cities moderate (13%)2026-09-10: 1012 of 2585 cities fair (39%)2026-09-10: 1197 of 2585 cities good (46%)2026-09-11: 31 of 2411 cities extremely poor (1%)2026-09-11: 1 of 2411 cities very poor (0%)2026-09-11: 25 of 2411 cities poor (1%)2026-09-11: 321 of 2411 cities moderate (13%)2026-09-11: 989 of 2411 cities fair (41%)2026-09-11: 1044 of 2411 cities good (43%)2026-09-12: 6 of 2461 cities extremely poor (0%)2026-09-12: 3 of 2461 cities very poor (0%)2026-09-12: 23 of 2461 cities poor (1%)2026-09-12: 333 of 2461 cities moderate (14%)2026-09-12: 1308 of 2461 cities fair (53%)2026-09-12: 788 of 2461 cities good (32%)2026-09-13: 5 of 2301 cities extremely poor (0%)2026-09-13: 1 of 2301 cities very poor (0%)2026-09-13: 22 of 2301 cities poor (1%)2026-09-13: 379 of 2301 cities moderate (16%)2026-09-13: 1117 of 2301 cities fair (49%)2026-09-13: 777 of 2301 cities good (34%)2026-09-14: 17 of 2459 cities extremely poor (1%)2026-09-14: 3 of 2459 cities very poor (0%)2026-09-14: 19 of 2459 cities poor (1%)2026-09-14: 368 of 2459 cities moderate (15%)2026-09-14: 951 of 2459 cities fair (39%)2026-09-14: 1101 of 2459 cities good (45%)Sep 142026-09-15: 22 of 2547 cities extremely poor (1%)2026-09-15: 4 of 2547 cities very poor (0%)2026-09-15: 20 of 2547 cities poor (1%)2026-09-15: 344 of 2547 cities moderate (14%)2026-09-15: 1100 of 2547 cities fair (43%)2026-09-15: 1057 of 2547 cities good (41%)2026-09-16: 35 of 2618 cities extremely poor (1%)2026-09-16: 2 of 2618 cities very poor (0%)2026-09-16: 36 of 2618 cities poor (1%)2026-09-16: 344 of 2618 cities moderate (13%)2026-09-16: 1175 of 2618 cities fair (45%)2026-09-16: 1026 of 2618 cities good (39%)2026-09-17: 23 of 2610 cities extremely poor (1%)2026-09-17: 2 of 2610 cities very poor (0%)2026-09-17: 29 of 2610 cities poor (1%)2026-09-17: 324 of 2610 cities moderate (12%)2026-09-17: 1279 of 2610 cities fair (49%)2026-09-17: 953 of 2610 cities good (37%)2026-09-18: 23 of 2681 cities extremely poor (1%)2026-09-18: 17 of 2681 cities poor (1%)2026-09-18: 308 of 2681 cities moderate (11%)2026-09-18: 1411 of 2681 cities fair (53%)2026-09-18: 922 of 2681 cities good (34%)2026-09-19: 9 of 2685 cities extremely poor (0%)2026-09-19: 1 of 2685 cities very poor (0%)2026-09-19: 39 of 2685 cities poor (1%)2026-09-19: 289 of 2685 cities moderate (11%)2026-09-19: 1450 of 2685 cities fair (54%)2026-09-19: 897 of 2685 cities good (33%)2026-09-20: 7 of 2432 cities extremely poor (0%)2026-09-20: 4 of 2432 cities very poor (0%)2026-09-20: 46 of 2432 cities poor (2%)2026-09-20: 255 of 2432 cities moderate (10%)2026-09-20: 1083 of 2432 cities fair (45%)2026-09-20: 1037 of 2432 cities good (43%)2026-09-21: 27 of 2553 cities extremely poor (1%)2026-09-21: 7 of 2553 cities very poor (0%)2026-09-21: 42 of 2553 cities poor (2%)2026-09-21: 286 of 2553 cities moderate (11%)2026-09-21: 980 of 2553 cities fair (38%)2026-09-21: 1211 of 2553 cities good (47%)Sep 212026-09-22: 4 of 2619 cities extremely poor (0%)2026-09-22: 6 of 2619 cities very poor (0%)2026-09-22: 61 of 2619 cities poor (2%)2026-09-22: 286 of 2619 cities moderate (11%)2026-09-22: 1211 of 2619 cities fair (46%)2026-09-22: 1051 of 2619 cities good (40%)2026-09-23: 1 of 2685 cities extremely poor (0%)2026-09-23: 10 of 2685 cities very poor (0%)2026-09-23: 59 of 2685 cities poor (2%)2026-09-23: 310 of 2685 cities moderate (12%)2026-09-23: 1297 of 2685 cities fair (48%)2026-09-23: 1008 of 2685 cities good (38%)2026-09-24: 1 of 2700 cities extremely poor (0%)2026-09-24: 6 of 2700 cities very poor (0%)2026-09-24: 44 of 2700 cities poor (2%)2026-09-24: 391 of 2700 cities moderate (14%)2026-09-24: 1352 of 2700 cities fair (50%)2026-09-24: 906 of 2700 cities good (34%)2026-09-25: 3 of 2658 cities very poor (0%)2026-09-25: 28 of 2658 cities poor (1%)2026-09-25: 401 of 2658 cities moderate (15%)2026-09-25: 1477 of 2658 cities fair (56%)2026-09-25: 749 of 2658 cities good (28%)2026-09-26: 2 of 2665 cities very poor (0%)2026-09-26: 28 of 2665 cities poor (1%)2026-09-26: 320 of 2665 cities moderate (12%)2026-09-26: 1529 of 2665 cities fair (57%)2026-09-26: 786 of 2665 cities good (29%)2026-09-27: 2 of 2564 cities very poor (0%)2026-09-27: 23 of 2564 cities poor (1%)2026-09-27: 301 of 2564 cities moderate (12%)2026-09-27: 1390 of 2564 cities fair (54%)2026-09-27: 848 of 2564 cities good (33%)2026-09-28: 1 of 2634 cities very poor (0%)2026-09-28: 22 of 2634 cities poor (1%)2026-09-28: 326 of 2634 cities moderate (12%)2026-09-28: 1479 of 2634 cities fair (56%)2026-09-28: 806 of 2634 cities good (31%)Sep 282026-09-29: 1 of 2679 cities very poor (0%)2026-09-29: 28 of 2679 cities poor (1%)2026-09-29: 372 of 2679 cities moderate (14%)2026-09-29: 1454 of 2679 cities fair (54%)2026-09-29: 824 of 2679 cities good (31%)2026-09-30: 1 of 2442 cities very poor (0%)2026-09-30: 15 of 2442 cities poor (1%)2026-09-30: 240 of 2442 cities moderate (10%)2026-09-30: 1507 of 2442 cities fair (62%)2026-09-30: 679 of 2442 cities good (28%)2026-10-01: 1 of 1541 cities very poor (0%)2026-10-01: 8 of 1541 cities poor (1%)2026-10-01: 167 of 1541 cities moderate (11%)2026-10-01: 924 of 1541 cities fair (60%)2026-10-01: 441 of 1541 cities good (29%)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.

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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 in µg/m³.