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
    22
  2. 2BrightonEngland
    20
  3. 3NottinghamEngland
    18
  4. 4Manchesterlow-cost sensorsEngland
    18
  5. 5Kingston upon HullEngland
    18
  6. 5CanterburyEngland
    18
  7. 7Stoke-on-TrentEngland
    18
  8. 7Briton FerryWales
    18
  9. 7BexleyEngland
    18
  10. 10PortsmouthEngland
    17
  11. 10NorwichEngland
    17
  12. 10Birminghamlow-cost sensorsEngland
    17
  13. 13LeedsEngland
    17
  14. 14LondonEngland
    17
  15. 15DagenhamEngland
    17
  16. 15BarnstapleEngland
    17
  17. 17WiganEngland
    15
  18. 17SouthamptonEngland
    15
  19. 17Clacton-on-SeaEngland
    15
  20. 20PrestonEngland
    15
  21. 20ChesterfieldEngland
    15
  22. 22SeafordEngland
    15
  23. 23NewmarketEngland
    15
  24. 24YorkEngland
    15
  25. 24DerryNorthern Ireland
    15
  26. 24Royal Leamington SpaEngland
    15
  27. 27SpekeEngland
    15
  28. 28HayesEngland
    15
  29. 29PlymouthEngland
    13
  30. 29LiverpoolEngland
    13
  31. 31IrlamEngland
    13
  32. 32NewportWales
    13
  33. 33BanbridgeNorthern Ireland
    13
  34. 34AndoverEngland
    13
  35. 35BelfastNorthern Ireland
    12
  36. 36OxfordEngland
    12
  37. 37MiddlesbroughEngland
    12
  38. 37GlasgowScotland
    12
  39. 39Newton AbbotEngland
    10
  40. 40SaltashEngland
    10
  41. 40PenicuikScotland
    10
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+

India's National Air Quality Index (CPCB), PM2.5 sub-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

Use this board

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

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.