The world's most polluted cities, ranked

227 of 2,311 measured cities in 84 countries breathed air above the WHO 24-hour guideline of 15 µg/m³ over the last 30 days. The worst was Kinshasa, Democratic Republic of the Congo, at 78.2.

#14 Faisalabad 55.6 µg/m³, more polluted than 99% of 2,311
← Kinshasa 78.2 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. 1Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo 78.2
  2. 2Gujranwalalow-cost sensorsPunjab, Pakistan 70.3
  3. 3Dera MāndiDelhi, India 69.8
  4. 4Blantyrelow-cost sensorsSouthern Region, Malawi 66.7
  5. 5JīndHaryana, India 66.1
  6. 6Lilongwelow-cost sensorsCentral Region, Malawi 63.3
  7. 7Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan 62.2
  8. 8GurugramHaryana, India 62.0
  9. 9Lahorelow-cost sensorsPunjab, Pakistan 61.6
  10. 10Yamuna NagarHaryana, India 59.7
  11. 11Zombalow-cost sensorsSouthern Region, Malawi 58.6
  12. 12Kampalalow-cost sensorsCentral Region, Uganda 56.4
  13. 13Multanlow-cost sensorsPunjab, Pakistan 56.2
  14. 14Faisalabadlow-cost sensorsPunjab, Pakistan 55.6
  15. 15Jammulow-cost sensorsJammu and Kashmir, India 55.1
  16. 16NoidaUttar Pradesh, India 52.4
  17. 17KaithalHaryana, India 51.5
  18. 18Sialkotlow-cost sensorsPunjab, Pakistan 50.9
  19. 19BhiwadiRajasthan, India 50.8
  20. 20Dhakalow-cost sensorsDhaka Division, Bangladesh 50.5
  21. 21Singaporelow-cost sensorsSingapore 49.0
  22. 22DādriUttar Pradesh, India 48.8
  23. 23DhāruheraHaryana, India 48.3
  24. 24Rahim Yar Khanlow-cost sensorsPunjab, Pakistan 47.4
  25. 25Saint-Louislow-cost sensorsSaint-Louis, Senegal 46.1
  26. 26Dubailow-cost sensorsDubai, United Arab Emirates 45.7
  27. 27Queenstown Estatelow-cost sensorsSingapore 45.5
  28. 28JalandharPunjab, India 45.1
  29. 29BahadurgarhHaryana, India 43.0
  30. 30FaridabadHaryana, India 41.9
  31. 30ChittoorAndhra Pradesh, India 41.9
  32. 32Rawalpindilow-cost sensorsPunjab, Pakistan 41.6
  33. 33Bahawalpurlow-cost sensorsPunjab, Pakistan 41.5
  34. 34Karongalow-cost sensorsNorthern Region, Malawi 40.7
  35. 35HāpurUttar Pradesh, India 40.5
  36. 36Tabananlow-cost sensorsBali, Indonesia 40.4
  37. 36BaddiHimachal Pradesh, India 40.4
  38. 38DushanbeDushanbe, Tajikistan 40.1
  39. 39Alipurlow-cost sensorsIslamabad, Pakistan 39.9
  40. 40Hararelow-cost sensorsHarare, Zimbabwe 39.6
  41. 41AmbālaHaryana, India 39.5
  42. 42AnantapurAndhra Pradesh, India 39.0
  43. 43DelhiDelhi, India 38.3
  44. 44ThānesarHaryana, India 38.2
  45. 45Sri GanganagarRajasthan, India 37.9
  46. 46SonīpatHaryana, India 37.8
  47. 46MuzaffarnagarUttar Pradesh, India 37.8
  48. 48NarelaDelhi, India 37.5
  49. 49Islamabadlow-cost sensorsIslamabad, Pakistan 37.4
  50. 50Greater NoidaUttar Pradesh, India 37.3
All 2,311 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

Kinshasa5 days #12026-09-02: 70.1 µg/m³, #62026-09-03: 43.2 µg/m³2026-09-04: 73.1 µg/m³, #42026-09-05: 51.9 µg/m³2026-09-06: 78.5 µg/m³, #52026-09-07: 111.2 µg/m³, #12026-09-08: 138.0 µg/m³, #12026-09-09: 58.3 µg/m³2026-09-10: 70.7 µg/m³, #52026-09-11: 83.0 µg/m³, #12026-09-12: 70.9 µg/m³, #32026-09-14: 86.5 µg/m³, #32026-09-15: 102.1 µg/m³, #32026-09-16: 51.1 µg/m³2026-09-17: 56.0 µg/m³, #92026-09-18: 72.4 µg/m³, #12026-09-19: 71.9 µg/m³2026-09-20: 73.4 µg/m³2026-09-21: 71.2 µg/m³2026-09-23: 113.0 µg/m³, #22026-09-24: 151.0 µg/m³, #12026-09-25: 114.0 µg/m³, #22026-09-26: 65.6 µg/m³, #102026-09-27: 50.1 µg/m³2026-09-28: 58.2 µg/m³2026-09-30: 75.5 µg/m³, #42026-10-01: 49.9 µg/m³, #9Gurugram4 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: 49.7 µg/m³2026-09-10: 57.7 µg/m³2026-09-11: 39.0 µg/m³2026-09-12: 19.6 µg/m³2026-09-13: 24.3 µg/m³2026-09-14: 23.9 µg/m³2026-09-15: 32.6 µg/m³2026-09-16: 21.8 µg/m³2026-09-17: 31.4 µg/m³2026-09-18: 34.4 µg/m³2026-09-19: 181.0 µg/m³, #12026-09-20: 212.0 µg/m³, #12026-09-21: 144.0 µg/m³, #22026-09-22: 51.2 µg/m³2026-09-24: 67.3 µg/m³2026-09-25: 61.5 µg/m³2026-09-26: 86.4 µg/m³, #42026-09-27: 109.0 µg/m³, #12026-09-28: 104.0 µg/m³, #1Saint-Louis3 days #12026-09-02: 7.0 µg/m³2026-09-03: 5.7 µg/m³2026-09-04: 7.2 µg/m³2026-09-05: 24.9 µg/m³2026-09-06: 17.2 µg/m³2026-09-07: 7.4 µg/m³2026-09-08: 8.7 µg/m³2026-09-09: 145.0 µg/m³, #12026-09-12: 12.7 µg/m³2026-09-13: 38.3 µg/m³2026-09-14: 25.0 µg/m³2026-09-17: 231.9 µg/m³, #12026-09-18: 53.9 µg/m³, #92026-09-19: 26.6 µg/m³2026-09-20: 12.3 µg/m³2026-09-21: 309.7 µg/m³, #12026-09-22: 43.8 µg/m³2026-09-23: 51.0 µg/m³2026-09-24: 5.1 µg/m³2026-09-25: 6.4 µg/m³2026-09-26: 24.7 µg/m³2026-09-27: 7.3 µg/m³2026-09-28: 42.3 µg/m³2026-09-29: 8.2 µg/m³2026-09-30: 30.3 µg/m³Dera Māndi2 days #12026-09-02: 69.2 µg/m³, #72026-09-03: 88.8 µg/m³, #32026-09-04: 76.4 µg/m³, #12026-09-05: 68.1 µg/m³, #82026-09-06: 42.4 µg/m³2026-09-07: 35.9 µg/m³2026-09-08: 40.2 µg/m³2026-09-09: 55.9 µg/m³2026-09-10: 45.4 µg/m³2026-09-11: 42.8 µg/m³2026-09-12: 45.1 µg/m³2026-09-13: 47.5 µg/m³2026-09-14: 53.9 µg/m³2026-09-15: 70.8 µg/m³, #72026-09-16: 57.7 µg/m³, #102026-09-17: 74.3 µg/m³, #32026-09-18: 54.5 µg/m³, #82026-09-19: 85.1 µg/m³, #42026-09-20: 147.0 µg/m³, #22026-09-21: 102.0 µg/m³, #62026-09-22: 94.9 µg/m³, #52026-09-23: 90.5 µg/m³, #82026-09-24: 122.0 µg/m³, #22026-09-25: 158.0 µg/m³, #12026-09-26: 40.0 µg/m³2026-09-27: 44.0 µg/m³2026-09-28: 47.8 µg/m³2026-09-29: 53.4 µg/m³Blantyre2 days #12026-09-02: 105.0 µg/m³, #22026-09-03: 80.8 µg/m³, #52026-09-04: 64.4 µg/m³, #82026-09-05: 91.5 µg/m³, #22026-09-06: 119.0 µg/m³, #22026-09-07: 69.0 µg/m³, #52026-09-08: 27.9 µg/m³2026-09-09: 19.6 µg/m³2026-09-10: 34.0 µg/m³2026-09-11: 54.1 µg/m³2026-09-12: 91.4 µg/m³, #22026-09-13: 121.0 µg/m³, #12026-09-14: 116.0 µg/m³, #12026-09-15: 116.0 µg/m³, #22026-09-16: 75.3 µg/m³, #42026-09-17: 38.7 µg/m³2026-09-18: 53.8 µg/m³, #102026-09-19: 90.0 µg/m³, #22026-09-20: 61.0 µg/m³2026-09-21: 58.7 µg/m³2026-09-22: 75.0 µg/m³2026-09-23: 47.2 µg/m³2026-09-24: 70.1 µg/m³2026-09-25: 43.2 µg/m³2026-09-26: 64.2 µg/m³2026-09-27: 49.1 µg/m³2026-09-28: 60.5 µg/m³, #82026-09-29: 63.9 µg/m³, #72026-09-30: 29.6 µg/m³2026-10-01: 12.3 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/m³, #102026-09-06: 51.0 µg/m³2026-09-07: 69.1 µg/m³, #42026-09-08: 80.0 µg/m³, #22026-09-09: 65.9 µg/m³, #82026-09-10: 49.4 µg/m³2026-09-11: 58.0 µg/m³, #62026-09-12: 59.6 µg/m³, #62026-09-13: 77.4 µg/m³, #22026-09-14: 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/m³, #32026-09-20: 87.6 µg/m³, #52026-09-21: 130.0 µg/m³, #32026-09-22: 108.5 µg/m³, #12026-09-23: 104.0 µg/m³, #32026-09-24: 96.4 µg/m³, #52026-09-25: 83.0 µg/m³, #62026-09-26: 67.8 µg/m³, #92026-09-27: 105.5 µg/m³, #22026-09-28: 53.9 µg/m³2026-09-29: 52.5 µg/m³2026-09-30: 81.0 µg/m³, #32026-10-01: 104.0 µg/m³, #1Lilongwe1 day #12026-09-02: 116.0 µg/m³, #12026-09-03: 100.0 µg/m³, #22026-09-04: 74.8 µg/m³, #32026-09-05: 68.6 µg/m³, #72026-09-06: 65.6 µg/m³, #82026-09-07: 73.3 µg/m³, #32026-09-08: 46.4 µg/m³2026-09-09: 25.8 µg/m³2026-09-10: 37.6 µg/m³2026-09-11: 47.4 µg/m³2026-09-12: 59.8 µg/m³, #52026-09-13: 58.5 µg/m³, #102026-09-14: 72.1 µg/m³, #62026-09-15: 95.2 µg/m³, #42026-09-16: 78.7 µg/m³, #22026-09-17: 61.8 µg/m³, #52026-09-18: 49.6 µg/m³2026-09-19: 61.9 µg/m³2026-09-20: 64.1 µg/m³2026-09-21: 64.1 µg/m³2026-09-22: 95.1 µg/m³, #42026-09-23: 94.7 µg/m³, #62026-09-24: 62.0 µg/m³2026-09-25: 62.1 µg/m³2026-09-26: 54.8 µg/m³2026-09-27: 41.7 µg/m³2026-09-28: 43.2 µg/m³2026-09-29: 49.5 µg/m³2026-09-30: 48.9 µg/m³2026-10-01: 26.9 µg/m³Smederevo1 day #12026-09-02: 45.2 µg/m³2026-09-03: 128.0 µg/m³, #12026-09-04: 12.2 µg/m³2026-09-05: 10.0 µg/m³2026-09-07: 13.5 µg/m³2026-09-09: 16.3 µg/m³2026-09-10: 16.7 µg/m³2026-09-11: 15.2 µg/m³2026-09-12: 13.2 µg/m³2026-09-14: 15.6 µg/m³2026-09-15: 12.6 µg/m³2026-09-16: 20.6 µg/m³2026-09-17: 20.6 µg/m³2026-09-18: 12.3 µg/m³2026-09-19: 13.3 µg/m³2026-09-21: 13.6 µg/m³2026-09-22: 7.9 µg/m³2026-09-23: 7.2 µg/m³2026-09-24: 10.1 µg/m³2026-09-25: 16.0 µg/m³2026-09-26: 25.2 µg/m³2026-09-27: 22.0 µg/m³2026-09-28: 17.3 µg/m³2026-09-29: 21.0 µg/m³2026-09-30: 17.3 µg/m³Neelankarai1 day #12026-09-02: 44.2 µg/m³2026-09-03: 18.3 µg/m³2026-09-04: 16.4 µg/m³2026-09-05: 162.0 µg/m³, #12026-09-06: 101.0 µg/m³, #32026-09-07: 48.1 µg/m³2026-09-10: 70.4 µg/m³, #62026-09-24: 20.2 µg/m³2026-09-25: 16.7 µg/m³2026-09-26: 20.6 µg/m³2026-09-27: 32.1 µg/m³2026-09-28: 30.0 µg/m³Bhāgalpur1 day #12026-09-02: 78.3 µg/m³, #52026-09-03: 63.9 µg/m³, #62026-09-04: 69.3 µg/m³, #52026-09-05: 62.4 µg/m³2026-09-06: 128.0 µg/m³, #12026-09-08: 40.7 µg/m³2026-09-09: 41.3 µg/m³2026-09-10: 70.2 µg/m³, #72026-09-13: 12.7 µg/m³2026-09-16: 10.1 µg/m³2026-09-18: 40.1 µg/m³2026-09-19: 60.4 µg/m³2026-09-20: 69.7 µg/m³2026-09-21: 19.7 µg/m³2026-09-22: 34.4 µg/m³2026-09-23: 32.3 µg/m³2026-09-26: 16.2 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: 3 of 2352 cities very poor (0%)2026-09-02: 9 of 2352 cities poor (0%)2026-09-02: 206 of 2352 cities moderate (9%)2026-09-02: 1288 of 2352 cities fair (55%)2026-09-02: 846 of 2352 cities good (36%)Sep 22026-09-03: 2 of 2356 cities very poor (0%)2026-09-03: 13 of 2356 cities poor (1%)2026-09-03: 198 of 2356 cities moderate (8%)2026-09-03: 1111 of 2356 cities fair (47%)2026-09-03: 1032 of 2356 cities good (44%)2026-09-04: 17 of 2347 cities poor (1%)2026-09-04: 205 of 2347 cities moderate (9%)2026-09-04: 914 of 2347 cities fair (39%)2026-09-04: 1211 of 2347 cities good (52%)2026-09-05: 1 of 2355 cities extremely poor (0%)2026-09-05: 1 of 2355 cities very poor (0%)2026-09-05: 16 of 2355 cities poor (1%)2026-09-05: 221 of 2355 cities moderate (9%)2026-09-05: 937 of 2355 cities fair (40%)2026-09-05: 1179 of 2355 cities good (50%)2026-09-06: 4 of 2144 cities very poor (0%)2026-09-06: 10 of 2144 cities poor (0%)2026-09-06: 196 of 2144 cities moderate (9%)2026-09-06: 925 of 2144 cities fair (43%)2026-09-06: 1009 of 2144 cities good (47%)2026-09-07: 1 of 2332 cities very poor (0%)2026-09-07: 16 of 2332 cities poor (1%)2026-09-07: 220 of 2332 cities moderate (9%)2026-09-07: 916 of 2332 cities fair (39%)2026-09-07: 1179 of 2332 cities good (51%)Sep 72026-09-08: 1 of 2296 cities very poor (0%)2026-09-08: 18 of 2296 cities poor (1%)2026-09-08: 224 of 2296 cities moderate (10%)2026-09-08: 1048 of 2296 cities fair (46%)2026-09-08: 1005 of 2296 cities good (44%)2026-09-09: 1 of 2331 cities extremely poor (0%)2026-09-09: 1 of 2331 cities very poor (0%)2026-09-09: 22 of 2331 cities poor (1%)2026-09-09: 215 of 2331 cities moderate (9%)2026-09-09: 926 of 2331 cities fair (40%)2026-09-09: 1166 of 2331 cities good (50%)2026-09-10: 2 of 2277 cities very poor (0%)2026-09-10: 15 of 2277 cities poor (1%)2026-09-10: 223 of 2277 cities moderate (10%)2026-09-10: 995 of 2277 cities fair (44%)2026-09-10: 1042 of 2277 cities good (46%)2026-09-11: 16 of 2087 cities poor (1%)2026-09-11: 218 of 2087 cities moderate (10%)2026-09-11: 833 of 2087 cities fair (40%)2026-09-11: 1020 of 2087 cities good (49%)2026-09-12: 2 of 2141 cities very poor (0%)2026-09-12: 14 of 2141 cities poor (1%)2026-09-12: 217 of 2141 cities moderate (10%)2026-09-12: 1032 of 2141 cities fair (48%)2026-09-12: 876 of 2141 cities good (41%)2026-09-13: 1 of 1995 cities very poor (0%)2026-09-13: 14 of 1995 cities poor (1%)2026-09-13: 206 of 1995 cities moderate (10%)2026-09-13: 1104 of 1995 cities fair (55%)2026-09-13: 670 of 1995 cities good (34%)2026-09-14: 2 of 2148 cities very poor (0%)2026-09-14: 14 of 2148 cities poor (1%)2026-09-14: 177 of 2148 cities moderate (8%)2026-09-14: 918 of 2148 cities fair (43%)2026-09-14: 1037 of 2148 cities good (48%)Sep 142026-09-15: 1 of 2236 cities extremely poor (0%)2026-09-15: 3 of 2236 cities very poor (0%)2026-09-15: 15 of 2236 cities poor (1%)2026-09-15: 194 of 2236 cities moderate (9%)2026-09-15: 882 of 2236 cities fair (39%)2026-09-15: 1141 of 2236 cities good (51%)2026-09-16: 20 of 2312 cities poor (1%)2026-09-16: 222 of 2312 cities moderate (10%)2026-09-16: 1000 of 2312 cities fair (43%)2026-09-16: 1070 of 2312 cities good (46%)2026-09-17: 1 of 2312 cities extremely poor (0%)2026-09-17: 1 of 2312 cities very poor (0%)2026-09-17: 17 of 2312 cities poor (1%)2026-09-17: 242 of 2312 cities moderate (10%)2026-09-17: 1083 of 2312 cities fair (47%)2026-09-17: 968 of 2312 cities good (42%)2026-09-18: 12 of 2358 cities poor (1%)2026-09-18: 210 of 2358 cities moderate (9%)2026-09-18: 1353 of 2358 cities fair (57%)2026-09-18: 783 of 2358 cities good (33%)2026-09-19: 1 of 2377 cities extremely poor (0%)2026-09-19: 32 of 2377 cities poor (1%)2026-09-19: 208 of 2377 cities moderate (9%)2026-09-19: 1238 of 2377 cities fair (52%)2026-09-19: 898 of 2377 cities good (38%)2026-09-20: 2 of 2128 cities extremely poor (0%)2026-09-20: 2 of 2128 cities very poor (0%)2026-09-20: 38 of 2128 cities poor (2%)2026-09-20: 182 of 2128 cities moderate (9%)2026-09-20: 917 of 2128 cities fair (43%)2026-09-20: 987 of 2128 cities good (46%)2026-09-21: 2 of 2254 cities extremely poor (0%)2026-09-21: 6 of 2254 cities very poor (0%)2026-09-21: 33 of 2254 cities poor (1%)2026-09-21: 176 of 2254 cities moderate (8%)2026-09-21: 889 of 2254 cities fair (39%)2026-09-21: 1148 of 2254 cities good (51%)Sep 212026-09-22: 5 of 2311 cities very poor (0%)2026-09-22: 42 of 2311 cities poor (2%)2026-09-22: 173 of 2311 cities moderate (7%)2026-09-22: 1056 of 2311 cities fair (46%)2026-09-22: 1035 of 2311 cities good (45%)2026-09-23: 8 of 2367 cities very poor (0%)2026-09-23: 47 of 2367 cities poor (2%)2026-09-23: 179 of 2367 cities moderate (8%)2026-09-23: 1158 of 2367 cities fair (49%)2026-09-23: 975 of 2367 cities good (41%)2026-09-24: 1 of 2370 cities extremely poor (0%)2026-09-24: 6 of 2370 cities very poor (0%)2026-09-24: 30 of 2370 cities poor (1%)2026-09-24: 218 of 2370 cities moderate (9%)2026-09-24: 1197 of 2370 cities fair (51%)2026-09-24: 918 of 2370 cities good (39%)2026-09-25: 1 of 2338 cities extremely poor (0%)2026-09-25: 3 of 2338 cities very poor (0%)2026-09-25: 22 of 2338 cities poor (1%)2026-09-25: 229 of 2338 cities moderate (10%)2026-09-25: 1290 of 2338 cities fair (55%)2026-09-25: 793 of 2338 cities good (34%)2026-09-26: 2 of 2359 cities very poor (0%)2026-09-26: 23 of 2359 cities poor (1%)2026-09-26: 228 of 2359 cities moderate (10%)2026-09-26: 1288 of 2359 cities fair (55%)2026-09-26: 818 of 2359 cities good (35%)2026-09-27: 3 of 2260 cities very poor (0%)2026-09-27: 16 of 2260 cities poor (1%)2026-09-27: 212 of 2260 cities moderate (9%)2026-09-27: 1201 of 2260 cities fair (53%)2026-09-27: 828 of 2260 cities good (37%)2026-09-28: 1 of 2320 cities very poor (0%)2026-09-28: 17 of 2320 cities poor (1%)2026-09-28: 221 of 2320 cities moderate (10%)2026-09-28: 1267 of 2320 cities fair (55%)2026-09-28: 814 of 2320 cities good (35%)Sep 282026-09-29: 1 of 2352 cities very poor (0%)2026-09-29: 24 of 2352 cities poor (1%)2026-09-29: 263 of 2352 cities moderate (11%)2026-09-29: 1187 of 2352 cities fair (50%)2026-09-29: 877 of 2352 cities good (37%)2026-09-30: 1 of 2212 cities very poor (0%)2026-09-30: 15 of 2212 cities poor (1%)2026-09-30: 138 of 2212 cities moderate (6%)2026-09-30: 1349 of 2212 cities fair (61%)2026-09-30: 709 of 2212 cities good (32%)2026-10-01: 1 of 1397 cities very poor (0%)2026-10-01: 7 of 1397 cities poor (1%)2026-10-01: 88 of 1397 cities moderate (6%)2026-10-01: 823 of 1397 cities fair (59%)2026-10-01: 478 of 1397 cities good (34%)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, 02:00 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 02:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.