SmogRank / World / United Kingdom / April 2023

Most polluted cities in United Kingdom, April 2023

41 cities in United Kingdom ranked by their average PM2.5 over the 30 days. Worst: Cardiff at 13.4 µg/m³, #133 of 1,316 cities in the world. Cleanest: Penicuik at 5.7. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for 3 of these 30 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.

← Cardiff 13.4 µg/m³ 20 µg/m³0
Every city in United Kingdom ranked for April 2023, 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. 1CardiffWales
    13.4
  2. 2BrightonEngland
    11.5
  3. 3NottinghamEngland
    11.4
  4. 4Manchesterlow-cost sensorsEngland
    10.9
  5. 5Kingston upon HullEngland
    10.6
  6. 5CanterburyEngland
    10.6
  7. 7Stoke-on-TrentEngland
    10.5
  8. 7Briton FerryWales
    10.5
  9. 7BexleyEngland
    10.5
  10. 10PortsmouthEngland
    10.4
  11. 10NorwichEngland
    10.4
  12. 10Birminghamlow-cost sensorsEngland
    10.4
  13. 13LeedsEngland
    10.3
  14. 14LondonEngland
    10.1
  15. 15DagenhamEngland
    9.7
  16. 15BarnstapleEngland
    9.7
  17. 17WiganEngland
    9.4
  18. 17SouthamptonEngland
    9.4
  19. 17Clacton-on-SeaEngland
    9.4
  20. 20PrestonEngland
    9.2
  21. 20ChesterfieldEngland
    9.2
  22. 22SeafordEngland
    9.0
  23. 23NewmarketEngland
    8.9
  24. 24YorkEngland
    8.8
  25. 24DerryNorthern Ireland
    8.8
  26. 24Royal Leamington SpaEngland
    8.8
  27. 27SpekeEngland
    8.7
  28. 28HayesEngland
    8.6
  29. 29PlymouthEngland
    8.4
  30. 29LiverpoolEngland
    8.4
  31. 31IrlamEngland
    8.3
  32. 32NewportWales
    8.1
  33. 33BanbridgeNorthern Ireland
    7.9
  34. 34AndoverEngland
    7.7
  35. 35BelfastNorthern Ireland
    7.4
  36. 36OxfordEngland
    7.3
  37. 37MiddlesbroughEngland
    6.6
  38. 37GlasgowScotland
    6.6
  39. 39Newton AbbotEngland
    6.2
  40. 40SaltashEngland
    5.7
  41. 40PenicuikScotland
    5.7
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, April 2023 · United Kingdom now

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SmogRank, most polluted cities in United Kingdom, PM2.5, April 2023, smogrank.com/gb/history/2023-04 (accessed 2 Oct 2026).

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