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.

#45 Jangheung 92.0 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 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 2,623 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: 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 extremely poor (5%)2026-09-02: 3 of 2649 cities very poor (0%)2026-09-02: 15 of 2649 cities poor (1%)2026-09-02: 305 of 2649 cities moderate (12%)2026-09-02: 1326 of 2649 cities fair (50%)2026-09-02: 874 of 2649 cities good (33%)Sep 22026-09-03: 23 of 2653 cities extremely poor (1%)2026-09-03: 2 of 2653 cities very poor (0%)2026-09-03: 20 of 2653 cities poor (1%)2026-09-03: 305 of 2653 cities moderate (11%)2026-09-03: 1259 of 2653 cities fair (47%)2026-09-03: 1044 of 2653 cities good (39%)2026-09-04: 17 of 2654 cities extremely poor (1%)2026-09-04: 24 of 2654 cities poor (1%)2026-09-04: 312 of 2654 cities moderate (12%)2026-09-04: 1034 of 2654 cities fair (39%)2026-09-04: 1267 of 2654 cities good (48%)2026-09-05: 14 of 2662 cities extremely poor (1%)2026-09-05: 1 of 2662 cities very poor (0%)2026-09-05: 19 of 2662 cities poor (1%)2026-09-05: 325 of 2662 cities moderate (12%)2026-09-05: 986 of 2662 cities fair (37%)2026-09-05: 1317 of 2662 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: 284 of 2455 cities moderate (12%)2026-09-06: 1065 of 2455 cities fair (43%)2026-09-06: 1073 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: 291 of 2637 cities moderate (11%)2026-09-07: 1094 of 2637 cities fair (41%)2026-09-07: 1198 of 2637 cities good (45%)Sep 72026-09-08: 12 of 2600 cities extremely poor (0%)2026-09-08: 3 of 2600 cities very poor (0%)2026-09-08: 34 of 2600 cities poor (1%)2026-09-08: 318 of 2600 cities moderate (12%)2026-09-08: 1308 of 2600 cities fair (50%)2026-09-08: 925 of 2600 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: 315 of 2631 cities moderate (12%)2026-09-09: 1070 of 2631 cities fair (41%)2026-09-09: 1176 of 2631 cities good (45%)2026-09-10: 22 of 2579 cities extremely poor (1%)2026-09-10: 3 of 2579 cities very poor (0%)2026-09-10: 27 of 2579 cities poor (1%)2026-09-10: 327 of 2579 cities moderate (13%)2026-09-10: 991 of 2579 cities fair (38%)2026-09-10: 1209 of 2579 cities good (47%)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: 325 of 2411 cities moderate (13%)2026-09-11: 983 of 2411 cities fair (41%)2026-09-11: 1046 of 2411 cities good (43%)2026-09-12: 6 of 2468 cities extremely poor (0%)2026-09-12: 3 of 2468 cities very poor (0%)2026-09-12: 23 of 2468 cities poor (1%)2026-09-12: 338 of 2468 cities moderate (14%)2026-09-12: 1316 of 2468 cities fair (53%)2026-09-12: 782 of 2468 cities good (32%)2026-09-13: 5 of 2303 cities extremely poor (0%)2026-09-13: 1 of 2303 cities very poor (0%)2026-09-13: 22 of 2303 cities poor (1%)2026-09-13: 370 of 2303 cities moderate (16%)2026-09-13: 1132 of 2303 cities fair (49%)2026-09-13: 773 of 2303 cities good (34%)2026-09-14: 17 of 2455 cities extremely poor (1%)2026-09-14: 3 of 2455 cities very poor (0%)2026-09-14: 19 of 2455 cities poor (1%)2026-09-14: 366 of 2455 cities moderate (15%)2026-09-14: 947 of 2455 cities fair (39%)2026-09-14: 1103 of 2455 cities good (45%)Sep 142026-09-15: 22 of 2545 cities extremely poor (1%)2026-09-15: 4 of 2545 cities very poor (0%)2026-09-15: 20 of 2545 cities poor (1%)2026-09-15: 355 of 2545 cities moderate (14%)2026-09-15: 1099 of 2545 cities fair (43%)2026-09-15: 1045 of 2545 cities good (41%)2026-09-16: 35 of 2624 cities extremely poor (1%)2026-09-16: 2 of 2624 cities very poor (0%)2026-09-16: 36 of 2624 cities poor (1%)2026-09-16: 351 of 2624 cities moderate (13%)2026-09-16: 1157 of 2624 cities fair (44%)2026-09-16: 1043 of 2624 cities good (40%)2026-09-17: 23 of 2607 cities extremely poor (1%)2026-09-17: 2 of 2607 cities very poor (0%)2026-09-17: 29 of 2607 cities poor (1%)2026-09-17: 306 of 2607 cities moderate (12%)2026-09-17: 1298 of 2607 cities fair (50%)2026-09-17: 949 of 2607 cities good (36%)2026-09-18: 23 of 2683 cities extremely poor (1%)2026-09-18: 18 of 2683 cities poor (1%)2026-09-18: 303 of 2683 cities moderate (11%)2026-09-18: 1417 of 2683 cities fair (53%)2026-09-18: 922 of 2683 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: 288 of 2685 cities moderate (11%)2026-09-19: 1454 of 2685 cities fair (54%)2026-09-19: 894 of 2685 cities good (33%)2026-09-20: 7 of 2425 cities extremely poor (0%)2026-09-20: 4 of 2425 cities very poor (0%)2026-09-20: 45 of 2425 cities poor (2%)2026-09-20: 257 of 2425 cities moderate (11%)2026-09-20: 1074 of 2425 cities fair (44%)2026-09-20: 1038 of 2425 cities good (43%)2026-09-21: 27 of 2554 cities extremely poor (1%)2026-09-21: 7 of 2554 cities very poor (0%)2026-09-21: 42 of 2554 cities poor (2%)2026-09-21: 287 of 2554 cities moderate (11%)2026-09-21: 983 of 2554 cities fair (38%)2026-09-21: 1208 of 2554 cities good (47%)Sep 212026-09-22: 4 of 2628 cities extremely poor (0%)2026-09-22: 6 of 2628 cities very poor (0%)2026-09-22: 61 of 2628 cities poor (2%)2026-09-22: 292 of 2628 cities moderate (11%)2026-09-22: 1212 of 2628 cities fair (46%)2026-09-22: 1053 of 2628 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: 305 of 2685 cities moderate (11%)2026-09-23: 1298 of 2685 cities fair (48%)2026-09-23: 1012 of 2685 cities good (38%)2026-09-24: 1 of 2701 cities extremely poor (0%)2026-09-24: 6 of 2701 cities very poor (0%)2026-09-24: 44 of 2701 cities poor (2%)2026-09-24: 392 of 2701 cities moderate (15%)2026-09-24: 1361 of 2701 cities fair (50%)2026-09-24: 897 of 2701 cities good (33%)2026-09-25: 3 of 2659 cities very poor (0%)2026-09-25: 28 of 2659 cities poor (1%)2026-09-25: 399 of 2659 cities moderate (15%)2026-09-25: 1475 of 2659 cities fair (55%)2026-09-25: 754 of 2659 cities good (28%)2026-09-26: 2 of 2666 cities very poor (0%)2026-09-26: 28 of 2666 cities poor (1%)2026-09-26: 320 of 2666 cities moderate (12%)2026-09-26: 1513 of 2666 cities fair (57%)2026-09-26: 803 of 2666 cities good (30%)2026-09-27: 2 of 2560 cities very poor (0%)2026-09-27: 23 of 2560 cities poor (1%)2026-09-27: 298 of 2560 cities moderate (12%)2026-09-27: 1392 of 2560 cities fair (54%)2026-09-27: 845 of 2560 cities good (33%)2026-09-28: 1 of 2638 cities very poor (0%)2026-09-28: 22 of 2638 cities poor (1%)2026-09-28: 328 of 2638 cities moderate (12%)2026-09-28: 1477 of 2638 cities fair (56%)2026-09-28: 810 of 2638 cities good (31%)Sep 282026-09-29: 1 of 2681 cities very poor (0%)2026-09-29: 28 of 2681 cities poor (1%)2026-09-29: 373 of 2681 cities moderate (14%)2026-09-29: 1455 of 2681 cities fair (54%)2026-09-29: 824 of 2681 cities good (31%)2026-09-30: 1 of 2438 cities very poor (0%)2026-09-30: 15 of 2438 cities poor (1%)2026-09-30: 243 of 2438 cities moderate (10%)2026-09-30: 1500 of 2438 cities fair (62%)2026-09-30: 679 of 2438 cities good (28%)2026-10-01: 1 of 1506 cities very poor (0%)2026-10-01: 8 of 1506 cities poor (1%)2026-10-01: 164 of 1506 cities moderate (11%)2026-10-01: 922 of 1506 cities fair (61%)2026-10-01: 411 of 1506 cities good (27%)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.

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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 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.