SmogRank / Countries / United Kingdom / January 2023

Most polluted cities in United Kingdom, January 2023

35 cities in United Kingdom ranked by their average PM2.5 over the 31 days. Worst: Derry at 12.0 µg/m³, #192 of 849 cities in the world. Cleanest: Penicuik at 2.3. A city needs measurements on 70% of the days to be ranked.

  1. 1DerryNorthern Ireland
    12.0
  2. 2SouthamptonEngland
    11.5
  3. 2NottinghamEngland
    11.5
  4. 4BarnstapleEngland
    11.4
  5. 5PortsmouthEngland
    10.6
  6. 6LeedsEngland
    10.5
  7. 7LondonEngland
    10.4
  8. 8BrightonEngland
    10.2
  9. 9WiganEngland
    10.1
  10. 10HayesEngland
    10.0
  11. 11Manchesterlow-cost sensorsEngland
    9.8
  12. 12BexleyEngland
    9.7
  13. 13CanterburyEngland
    9.2
  14. 14Stoke-on-TrentEngland
    9.1
  15. 15DagenhamEngland
    9.0
  16. 16Birminghamlow-cost sensorsEngland
    8.9
  17. 17AndoverEngland
    8.6
  18. 18Southend-on-SeaEngland
    8.5
  19. 19OxfordEngland
    8.3
  20. 19Kingston upon HullEngland
    8.3
  21. 21Royal Leamington SpaEngland
    8.1
  22. 21ChesterfieldEngland
    8.1
  23. 23SheffieldEngland
    7.9
  24. 23Clacton-on-SeaEngland
    7.9
  25. 25PrestonEngland
    7.8
  26. 26YorkEngland
    7.7
  27. 26NewmarketEngland
    7.7
  28. 28LiverpoolEngland
    7.6
  29. 29SeafordEngland
    7.4
  30. 29BelfastNorthern Ireland
    7.4
  31. 31SpekeEngland
    7.3
  32. 32SaltashEngland
    5.7
  33. 33GlasgowScotland
    4.6
  34. 34EdinburghScotland
    3.4
  35. 35PenicuikScotland
    2.3
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, January 2023 · United Kingdom now

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SmogRank, most polluted cities in United Kingdom, PM2.5, January 2023, smogrank.com/gb/history/2023-01 (accessed 2 Oct 2026).

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