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, #118 of 1,251 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
Every city in United Kingdom ranked for April 2023, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1CardiffWales
    2
  2. 2BrightonEngland
    2
  3. 3NottinghamEngland
    1
  4. 4Manchesterlow-cost sensorsEngland
    1
  5. 5Kingston upon HullEngland
    1
  6. 5CanterburyEngland
    1
  7. 7Stoke-on-TrentEngland
    1
  8. 7Briton FerryWales
    1
  9. 7BexleyEngland
    1
  10. 10PortsmouthEngland
    1
  11. 10NorwichEngland
    1
  12. 10Birminghamlow-cost sensorsEngland
    1
  13. 13LeedsEngland
    1
  14. 14LondonEngland
    1
  15. 15DagenhamEngland
    1
  16. 15BarnstapleEngland
    1
  17. 17WiganEngland
    1
  18. 17SouthamptonEngland
    1
  19. 17Clacton-on-SeaEngland
    1
  20. 20PrestonEngland
    1
  21. 20ChesterfieldEngland
    1
  22. 22SeafordEngland
    1
  23. 23NewmarketEngland
    1
  24. 24YorkEngland
    1
  25. 24DerryNorthern Ireland
    1
  26. 24Royal Leamington SpaEngland
    1
  27. 27SpekeEngland
    1
  28. 28HayesEngland
    1
  29. 29PlymouthEngland
    1
  30. 29LiverpoolEngland
    1
  31. 31IrlamEngland
    1
  32. 32NewportWales
    1
  33. 33BanbridgeNorthern Ireland
    1
  34. 34AndoverEngland
    1
  35. 35BelfastNorthern Ireland
    1
  36. 36OxfordEngland
    1
  37. 37MiddlesbroughEngland
    1
  38. 37GlasgowScotland
    1
  39. 39Newton AbbotEngland
    1
  40. 40SaltashEngland
    1
  41. 40PenicuikScotland
    1
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. 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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