SmogRank / Countries / United Kingdom / August 2025

Most polluted cities in United Kingdom, August 2025

59 cities in United Kingdom ranked by their average PM2.5 over the 31 days. Worst: Northampton at 8.7 µg/m³, #1,220 of 2,289 cities in the world. Cleanest: Derry at 3.0. A city needs measurements on 70% of the days to be ranked.

  1. 1NorthamptonEngland
    8.7
  2. 2SpekeEngland
    8.4
  3. 2LondonEngland
    8.4
  4. 4Manchesterlow-cost sensorsEngland
    8.0
  5. 4DartfordEngland
    8.0
  6. 6LeedsEngland
    7.6
  7. 7WiganEngland
    7.3
  8. 7HayesEngland
    7.3
  9. 7BelfastNorthern Ireland
    7.3
  10. 10DoncasterEngland
    7.2
  11. 10Birminghamlow-cost sensorsEngland
    7.2
  12. 12PlymouthEngland
    7.1
  13. 12Canvey IslandEngland
    7.1
  14. 14SouthamptonEngland
    6.9
  15. 14NottinghamEngland
    6.9
  16. 14Newcastle upon TyneEngland
    6.9
  17. 17Stoke-on-TrentEngland
    6.8
  18. 17LutonEngland
    6.8
  19. 17Kingston upon HullEngland
    6.8
  20. 20PrestonEngland
    6.7
  21. 20LeicesterEngland
    6.7
  22. 20IrlamEngland
    6.7
  23. 20BristolEngland
    6.7
  24. 24SheffieldEngland
    6.6
  25. 24DerbyEngland
    6.6
  26. 26Royal Leamington SpaEngland
    6.5
  27. 27YorkEngland
    6.4
  28. 27NewportWales
    6.4
  29. 27Cheadle HulmeEngland
    6.4
  30. 30LiverpoolEngland
    6.3
  31. 31BrightonEngland
    6.2
  32. 31BexleyEngland
    6.2
  33. 31BarnsleyEngland
    6.2
  34. 34SeafordEngland
    6.1
  35. 34CannockEngland
    6.1
  36. 36ScunthorpeEngland
    6.0
  37. 36PortsmouthEngland
    6.0
  38. 36Clacton-on-SeaEngland
    6.0
  39. 36ChesterfieldEngland
    6.0
  40. 36BarnstapleEngland
    6.0
  41. 41ReadingEngland
    5.9
  42. 42SunderlandEngland
    5.8
  43. 42NorwichEngland
    5.8
  44. 42AndoverEngland
    5.8
  45. 45NewmarketEngland
    5.5
  46. 45GlasgowScotland
    5.5
  47. 47EdinburghScotland
    5.4
  48. 48Briton FerryWales
    5.2
  49. 49GillinghamEngland
    5.0
  50. 50Westburylow-cost sensorsEngland
    4.9
  51. 50OxfordEngland
    4.9
  52. 52Newton AbbotEngland
    4.8
  53. 52High PeakEngland
    4.8
  54. 54PenicuikScotland
    4.7
  55. 55GrangemouthScotland
    4.5
  56. 56SaltashEngland
    4.4
  57. 57MiddlesbroughEngland
    3.9
  58. 58WarringtonEngland
    3.6
  59. 59DerryNorthern Ireland
    3.0
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, August 2025 · United Kingdom now