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
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
    20
  2. 2BrightonEngland
    17
  3. 3NottinghamEngland
    17
  4. 4Manchesterlow-cost sensorsEngland
    16
  5. 5Kingston upon HullEngland
    16
  6. 5CanterburyEngland
    16
  7. 7Stoke-on-TrentEngland
    15
  8. 7Briton FerryWales
    15
  9. 7BexleyEngland
    15
  10. 10PortsmouthEngland
    15
  11. 10NorwichEngland
    15
  12. 10Birminghamlow-cost sensorsEngland
    15
  13. 13LeedsEngland
    15
  14. 14LondonEngland
    15
  15. 15DagenhamEngland
    14
  16. 15BarnstapleEngland
    14
  17. 17WiganEngland
    14
  18. 17SouthamptonEngland
    14
  19. 17Clacton-on-SeaEngland
    14
  20. 20PrestonEngland
    14
  21. 20ChesterfieldEngland
    14
  22. 22SeafordEngland
    13
  23. 23NewmarketEngland
    13
  24. 24YorkEngland
    13
  25. 24DerryNorthern Ireland
    13
  26. 24Royal Leamington SpaEngland
    13
  27. 27SpekeEngland
    13
  28. 28HayesEngland
    13
  29. 29PlymouthEngland
    12
  30. 29LiverpoolEngland
    12
  31. 31IrlamEngland
    12
  32. 32NewportWales
    12
  33. 33BanbridgeNorthern Ireland
    12
  34. 34AndoverEngland
    11
  35. 35BelfastNorthern Ireland
    11
  36. 36OxfordEngland
    11
  37. 37MiddlesbroughEngland
    10
  38. 37GlasgowScotland
    10
  39. 39Newton AbbotEngland
    9
  40. 40SaltashEngland
    9
  41. 40PenicuikScotland
    9
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. 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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