SmogRank / United Kingdom / England

Air quality in London

England, United Kingdom. PM2.5 from 34 reference monitors, updated hourly.

4.8 µg/m³
Good

Latest hour (05:00 UTC), 0.3× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#650
of 2,327 · 9.2 µg/m³
30 days
#853
of 2,325 · 7.0 µg/m³
Year
#852
of 2,160 · 9.3 µg/m³

Last 4 days, hour by hour

15302026-09-30 20:00 UTC: 9.3 µg/m³2026-09-30 21:00 UTC: 9.0 µg/m³2026-10-01 00:00 UTC: 6.0 µg/m³2026-10-01 01:00 UTC: 5.7 µg/m³2026-10-01 02:00 UTC: 5.3 µg/m³2026-10-01 03:00 UTC: 6.0 µg/m³2026-10-01 04:00 UTC: 4.5 µg/m³2026-10-01 05:00 UTC: 4.8 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 12.3 µg/m³2025-09-30: 12.7 µg/m³2025-10-01: 13.4 µg/m³2025-10-02: 15.3 µg/m³2025-10-03: 6.2 µg/m³2025-10-04: 7.0 µg/m³2025-10-05: 5.9 µg/m³2025-10-06: 7.5 µg/m³2025-10-07: 8.2 µg/m³2025-10-08: 8.2 µg/m³2025-10-09: 8.9 µg/m³2025-10-10: 11.1 µg/m³2025-10-11: 15.0 µg/m³2025-10-12: 16.3 µg/m³2025-10-13: 8.0 µg/m³2025-10-14: 5.0 µg/m³2025-10-15: 4.7 µg/m³2025-10-16: 6.6 µg/m³2025-10-17: 7.8 µg/m³2025-10-18: 10.8 µg/m³2025-10-19: 8.4 µg/m³2025-10-20: 8.7 µg/m³2025-10-21: 6.0 µg/m³2025-10-22: 6.7 µg/m³2025-10-23: 5.0 µg/m³2025-10-24: 5.3 µg/m³2025-10-25: 5.3 µg/m³2025-10-26: 4.0 µg/m³2025-10-27: 5.8 µg/m³2025-10-28: 6.1 µg/m³2025-10-29: 5.9 µg/m³2025-10-30: 5.9 µg/m³2025-10-31: 6.1 µg/m³2025-11-01: 7.0 µg/m³2025-11-02: 6.3 µg/m³2025-11-03: 6.8 µg/m³2025-11-04: 7.1 µg/m³2025-11-05: 9.0 µg/m³2025-11-06: 9.7 µg/m³2025-11-07: 8.6 µg/m³2025-11-08: 16.4 µg/m³2025-11-09: 11.0 µg/m³2025-11-10: 5.1 µg/m³2025-11-11: 6.4 µg/m³2025-11-12: 8.5 µg/m³2025-11-13: 10.1 µg/m³2025-11-14: 15.8 µg/m³2025-11-15: 11.0 µg/m³2025-11-16: 5.2 µg/m³2025-11-17: 7.6 µg/m³2025-11-18: 9.7 µg/m³2025-11-19: 4.2 µg/m³2025-11-20: 5.8 µg/m³2025-11-21: 11.4 µg/m³2025-11-22: 5.7 µg/m³2025-11-23: 5.5 µg/m³2025-11-24: 5.4 µg/m³2025-11-25: 6.0 µg/m³2025-11-26: 11.1 µg/m³2025-11-27: 4.6 µg/m³2025-11-28: 8.4 µg/m³2025-11-29: 6.1 µg/m³2025-11-30: 5.3 µg/m³2025-12-01: 5.2 µg/m³2025-12-02: 6.0 µg/m³2025-12-03: 6.4 µg/m³2025-12-04: 7.3 µg/m³2025-12-05: 6.5 µg/m³2025-12-06: 8.9 µg/m³2025-12-07: 6.0 µg/m³2025-12-08: 7.9 µg/m³2025-12-09: 8.2 µg/m³2025-12-10: 10.0 µg/m³2025-12-11: 8.8 µg/m³2025-12-12: 8.9 µg/m³2025-12-13: 10.3 µg/m³2025-12-14: 7.6 µg/m³2025-12-15: 10.8 µg/m³2025-12-16: 10.2 µg/m³2025-12-17: 10.4 µg/m³2025-12-18: 5.0 µg/m³2025-12-19: 8.0 µg/m³2025-12-20: 9.4 µg/m³2025-12-21: 12.6 µg/m³2025-12-22: 17.9 µg/m³2025-12-23: 17.7 µg/m³2025-12-24: 8.8 µg/m³2025-12-25: 7.9 µg/m³2025-12-26: 13.0 µg/m³2025-12-27: 7.3 µg/m³2025-12-28: 9.8 µg/m³2025-12-29: 7.8 µg/m³2025-12-30: 8.1 µg/m³2025-12-31: 19.8 µg/m³2026-01-01: 8.5 µg/m³2026-01-02: 7.2 µg/m³2026-01-03: 6.5 µg/m³2026-01-04: 8.8 µg/m³2026-01-05: 9.9 µg/m³2026-01-06: 12.6 µg/m³2026-01-07: 7.4 µg/m³2026-01-08: 9.2 µg/m³2026-01-09: 8.1 µg/m³2026-01-10: 10.8 µg/m³2026-01-11: 9.0 µg/m³2026-01-12: 10.3 µg/m³2026-01-13: 7.5 µg/m³2026-01-14: 10.4 µg/m³2026-01-15: 5.3 µg/m³2026-01-16: 8.2 µg/m³2026-01-17: 11.1 µg/m³2026-01-18: 20.0 µg/m³2026-01-19: 14.9 µg/m³2026-01-20: 6.2 µg/m³2026-01-21: 5.3 µg/m³2026-01-22: 8.3 µg/m³2026-01-23: 7.3 µg/m³2026-01-24: 7.5 µg/m³2026-01-25: 12.3 µg/m³2026-01-26: 39.7 µg/m³2026-01-27: 6.4 µg/m³2026-01-28: 12.1 µg/m³2026-01-29: 15.7 µg/m³2026-01-30: 9.1 µg/m³2026-01-31: 8.4 µg/m³2026-02-01: 6.8 µg/m³2026-02-02: 11.7 µg/m³2026-02-03: 19.7 µg/m³2026-02-04: 11.9 µg/m³2026-02-05: 13.6 µg/m³2026-02-06: 10.9 µg/m³2026-02-07: 8.0 µg/m³2026-02-08: 8.6 µg/m³2026-02-09: 10.1 µg/m³2026-02-10: 8.5 µg/m³2026-02-11: 8.1 µg/m³2026-02-12: 9.6 µg/m³2026-02-13: 8.6 µg/m³2026-02-14: 8.0 µg/m³2026-02-15: 4.9 µg/m³2026-02-16: 5.8 µg/m³2026-02-17: 7.5 µg/m³2026-02-18: 9.1 µg/m³2026-02-19: 9.8 µg/m³2026-02-20: 11.1 µg/m³2026-02-21: 8.3 µg/m³2026-02-22: 7.0 µg/m³2026-02-23: 9.1 µg/m³2026-02-24: 9.7 µg/m³2026-02-25: 11.3 µg/m³2026-02-26: 8.0 µg/m³2026-02-27: 6.8 µg/m³2026-02-28: 6.8 µg/m³2026-03-01: 6.9 µg/m³2026-03-02: 10.5 µg/m³2026-03-03: 14.0 µg/m³2026-03-04: 32.7 µg/m³2026-03-05: 22.5 µg/m³2026-03-06: 20.7 µg/m³2026-03-07: 11.3 µg/m³2026-03-08: 27.5 µg/m³2026-03-09: 31.8 µg/m³2026-03-10: 10.8 µg/m³2026-03-11: 8.5 µg/m³2026-03-12: 7.4 µg/m³2026-03-13: 5.7 µg/m³2026-03-14: 9.2 µg/m³2026-03-15: 8.0 µg/m³2026-03-16: 8.2 µg/m³2026-03-17: 10.0 µg/m³2026-03-18: 12.4 µg/m³2026-03-19: 20.1 µg/m³2026-03-20: 21.8 µg/m³2026-03-21: 9.3 µg/m³2026-03-22: 20.9 µg/m³2026-03-23: 34.9 µg/m³2026-03-24: 15.7 µg/m³2026-03-25: 5.0 µg/m³2026-03-26: 6.2 µg/m³2026-03-27: 8.4 µg/m³2026-03-28: 6.8 µg/m³2026-03-29: 5.8 µg/m³2026-03-30: 9.4 µg/m³2026-03-31: 10.1 µg/m³2026-04-01: 9.0 µg/m³2026-04-02: 6.1 µg/m³2026-04-03: 5.0 µg/m³2026-04-04: 6.3 µg/m³2026-04-05: 4.8 µg/m³2026-04-06: 6.4 µg/m³2026-04-07: 14.7 µg/m³2026-04-08: 17.4 µg/m³2026-04-09: 9.8 µg/m³2026-04-10: 6.5 µg/m³2026-04-11: 6.9 µg/m³2026-04-12: 6.5 µg/m³2026-04-13: 7.6 µg/m³2026-04-14: 6.0 µg/m³2026-04-15: 6.5 µg/m³2026-04-16: 9.4 µg/m³2026-04-17: 8.3 µg/m³2026-04-18: 5.7 µg/m³2026-04-19: 5.3 µg/m³2026-04-20: 6.7 µg/m³2026-04-21: 8.3 µg/m³2026-04-22: 10.6 µg/m³2026-04-23: 11.4 µg/m³2026-04-24: 8.2 µg/m³2026-04-25: 11.8 µg/m³2026-04-26: 13.8 µg/m³2026-04-27: 13.2 µg/m³2026-04-28: 8.5 µg/m³2026-04-29: 9.4 µg/m³2026-04-30: 10.1 µg/m³2026-05-01: 6.7 µg/m³2026-05-02: 10.3 µg/m³2026-05-03: 9.2 µg/m³2026-05-04: 13.5 µg/m³2026-05-05: 8.9 µg/m³2026-05-06: 6.2 µg/m³2026-05-07: 9.4 µg/m³2026-05-08: 12.6 µg/m³2026-05-09: 21.9 µg/m³2026-05-10: 8.4 µg/m³2026-05-11: 4.0 µg/m³2026-05-12: 7.3 µg/m³2026-05-13: 6.8 µg/m³2026-05-14: 6.1 µg/m³2026-05-15: 6.4 µg/m³2026-05-16: 6.2 µg/m³2026-05-17: 5.1 µg/m³2026-05-18: 5.2 µg/m³2026-05-19: 7.8 µg/m³2026-05-20: 9.3 µg/m³2026-05-21: 9.8 µg/m³2026-05-22: 11.0 µg/m³2026-05-23: 12.9 µg/m³2026-05-24: 17.8 µg/m³2026-05-25: 21.9 µg/m³2026-05-26: 14.8 µg/m³2026-05-27: 19.4 µg/m³2026-05-28: 14.4 µg/m³2026-05-29: 9.7 µg/m³2026-05-30: 10.3 µg/m³2026-05-31: 6.4 µg/m³2026-06-01: 7.7 µg/m³2026-06-02: 5.7 µg/m³2026-06-03: 7.1 µg/m³2026-06-04: 6.0 µg/m³2026-06-05: 7.1 µg/m³2026-06-06: 6.0 µg/m³2026-06-07: 8.4 µg/m³2026-06-08: 6.3 µg/m³2026-06-09: 5.8 µg/m³2026-06-10: 6.3 µg/m³2026-06-11: 6.0 µg/m³2026-06-12: 4.1 µg/m³2026-06-13: 6.5 µg/m³2026-06-14: 6.3 µg/m³2026-06-15: 8.9 µg/m³2026-06-16: 8.6 µg/m³2026-06-17: 6.1 µg/m³2026-06-18: 7.8 µg/m³2026-06-19: 8.3 µg/m³2026-06-20: 3.9 µg/m³2026-06-21: 8.1 µg/m³2026-06-22: 8.7 µg/m³2026-06-23: 13.1 µg/m³2026-06-24: 22.2 µg/m³2026-06-25: 17.5 µg/m³2026-06-26: 16.4 µg/m³2026-06-27: 8.0 µg/m³2026-06-28: 5.3 µg/m³2026-06-29: 6.3 µg/m³2026-06-30: 6.5 µg/m³2026-07-01: 5.4 µg/m³2026-07-02: 4.9 µg/m³2026-07-03: 8.6 µg/m³2026-07-04: 5.9 µg/m³2026-07-05: 4.9 µg/m³2026-07-06: 4.4 µg/m³2026-07-07: 7.3 µg/m³2026-07-08: 11.6 µg/m³2026-07-09: 14.3 µg/m³2026-07-10: 12.0 µg/m³2026-07-11: 9.7 µg/m³2026-07-12: 7.8 µg/m³2026-07-13: 10.2 µg/m³2026-07-14: 10.6 µg/m³2026-07-15: 11.8 µg/m³2026-07-16: 13.5 µg/m³2026-07-17: 15.3 µg/m³2026-07-18: 12.3 µg/m³2026-07-19: 6.1 µg/m³2026-07-20: 7.0 µg/m³2026-07-21: 7.7 µg/m³2026-07-22: 10.0 µg/m³2026-07-23: 9.8 µg/m³2026-07-24: 11.1 µg/m³2026-07-25: 8.4 µg/m³2026-07-26: 5.4 µg/m³2026-07-27: 5.5 µg/m³2026-07-28: 7.4 µg/m³2026-07-29: 7.9 µg/m³2026-07-30: 5.9 µg/m³2026-07-31: 5.6 µg/m³2026-08-01: 6.6 µg/m³2026-08-02: 7.5 µg/m³2026-08-03: 10.4 µg/m³2026-08-04: 9.0 µg/m³2026-08-05: 5.5 µg/m³2026-08-06: 6.0 µg/m³2026-08-07: 6.8 µg/m³2026-08-08: 7.5 µg/m³2026-08-09: 10.3 µg/m³2026-08-10: 8.2 µg/m³2026-08-11: 7.7 µg/m³2026-08-12: 9.6 µg/m³2026-08-13: 11.4 µg/m³2026-08-14: 13.0 µg/m³2026-08-15: 6.7 µg/m³2026-08-16: 6.9 µg/m³2026-08-17: 5.5 µg/m³2026-08-18: 5.5 µg/m³2026-08-19: 4.7 µg/m³2026-08-20: 4.5 µg/m³2026-08-21: 4.9 µg/m³2026-08-22: 5.5 µg/m³2026-08-23: 8.0 µg/m³2026-08-24: 7.2 µg/m³2026-08-25: 8.2 µg/m³2026-08-26: 16.2 µg/m³2026-08-27: 9.5 µg/m³2026-08-28: 4.0 µg/m³2026-08-29: 3.3 µg/m³2026-08-30: 3.9 µg/m³2026-08-31: 4.5 µg/m³2026-09-01: 5.0 µg/m³2026-09-02: 5.4 µg/m³2026-09-03: 3.4 µg/m³2026-09-04: 4.7 µg/m³2026-09-05: 8.0 µg/m³2026-09-06: 7.6 µg/m³2026-09-07: 5.5 µg/m³2026-09-08: 5.7 µg/m³2026-09-09: 6.0 µg/m³2026-09-10: 6.1 µg/m³2026-09-11: 5.4 µg/m³2026-09-12: 5.7 µg/m³2026-09-13: 4.2 µg/m³2026-09-14: 4.4 µg/m³2026-09-15: 4.3 µg/m³2026-09-16: 4.6 µg/m³2026-09-17: 5.7 µg/m³2026-09-18: 10.8 µg/m³2026-09-19: 5.6 µg/m³2026-09-20: 7.4 µg/m³2026-09-21: 11.4 µg/m³2026-09-22: 10.6 µg/m³2026-09-23: 7.5 µg/m³2026-09-24: 7.3 µg/m³2026-09-25: 11.4 µg/m³2026-09-26: 7.8 µg/m³2026-09-27: 8.8 µg/m³2026-09-28: 5.9 µg/m³2026-09-29: 14.4 µg/m³2026-09-30: 8.9 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

31 of 365 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2077OctNovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2025: 13.8 µg/m³Jan 2026: 10.5 µg/m³JanFeb 2025: 15.8 µg/m³Feb 2026: 9.3 µg/m³FebMar 2025: 18.4 µg/m³Mar 2026: 14.0 µg/m³MarApr 2025: 12.8 µg/m³Apr 2026: 8.7 µg/m³AprMay 2025: 9.5 µg/m³May 2026: 10.3 µg/m³MayJun 2025: 8.5 µg/m³Jun 2026: 8.2 µg/m³JunJul 2025: 7.9 µg/m³Jul 2026: 8.7 µg/m³JulAug 2025: 8.4 µg/m³Aug 2026: 7.4 µg/m³AugSep 2025: 7.3 µg/m³Sep 2026: 7.0 µg/m³SepOct 2025: 7.9 µg/m³OctNov 2025: 8.0 µg/m³NovDec 2025: 9.4 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 9.2 µg/m³9.220252025: 9.7 µg/m³9.720242024: 5.8 µg/m³5.820232023: 7.4 µg/m³7.4

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Tower Hamlets - Mile End RoadUK OGL "Open Government License"London Air Quality NetworkReference
Westminster - Marylebone RoadUK OGL "Open Government License"London Air Quality NetworkReference
Bexley - Belvedere WestUK OGL "Open Government License"London Air Quality NetworkReference
Enfield - Bowes Primary SchoolUK OGL "Open Government License"London Air Quality NetworkReference
Brent - ARK Franklin Primary AcademyUK OGL "Open Government License"London Air Quality NetworkReference
Brent - Neasden LaneUK OGL "Open Government License"London Air Quality NetworkReference
Brent - John Keble Primary SchoolUK OGL "Open Government License"London Air Quality NetworkReference
Brent - IkeaUK OGL "Open Government License"London Air Quality NetworkReference
Greenwich - A206 Burrage GroveUK OGL "Open Government License"London Air Quality NetworkReference
Greenwich - Plumstead High StreetUK OGL "Open Government License"London Air Quality NetworkReference
Greenwich - John Harrison WayUK OGL "Open Government License"London Air Quality NetworkReference
Greenwich - Woolwich FlyoverUK OGL "Open Government License"London Air Quality NetworkReference
Lambeth - Brixton RoadUK OGL "Open Government License"London Air Quality NetworkReference
Richmond Upon Thames - Barnes WetlandsUK OGL "Open Government License"London Air Quality NetworkReference
Merton - Merton RoadUK OGL "Open Government License"London Air Quality NetworkReference
Greenwich - FalconwoodUK OGL "Open Government License"London Air Quality NetworkReference
Lewisham - Honor Oak ParkUK OGL "Open Government License"London Air Quality NetworkReference
Lavender HillUK OGL "Open Government License"London Air Quality NetworkReference
Wandsworth - BatterseaUK OGL "Open Government License"London Air Quality NetworkReference
Tower Hamlets - BlackwallUK OGL "Open Government License"London Air Quality NetworkReference
Wandsworth - Tooting High StreetUK OGL "Open Government License"London Air Quality NetworkReference
Wandsworth - PutneyUK OGL "Open Government License"London Air Quality NetworkReference
Wandsworth - Putney High StreetUK OGL "Open Government License"London Air Quality NetworkReference
Newham - Britannia GateUK OGL "Open Government License"London Air Quality NetworkReference
Waterloo Place (The Crown Estate)UK OGL "Open Government License"London Air Quality NetworkReference
Tower Hamlets - Jubilee ParkUK OGL "Open Government License"London Air Quality NetworkReference
Regent Street (The Crown Estate)UK OGL "Open Government License"London Air Quality NetworkReference
Coronation SquareCC BY 4.0RCLow-cost
UAL Creative Computing Institute, Greencoat BuildingCC BY 4.0UAL Creative Computing InstituteLow-cost
Marylebone RoadCC BY 4.0AirGradientLow-cost
Marylebone RoadCC BY 4.0AirGradientLow-cost
Woodville RoadCC BY 4.0AirGradientLow-cost
Maiden Lane, LondonCC BY 4.0GRL_CAULow-cost
Perivale, Buckingham AveCC BY 4.0TonyLow-cost
UAL Creative Computing Institute, Peckham Road BuildingCC BY 4.0UAL Creative Computing InstituteLow-cost
NASA GSFC Rutgers Calib. N16CC0 1.0ClarityLow-cost
Richmond Upon Thames - RichmondUK OGL "Open Government License"London Air Quality NetworkReference
Sutton SurreyCC BY 4.0RLow-cost
Merton - Plough Lane WimbledonUK OGL "Open Government License"London Air Quality NetworkReference
Merton - MitchamUK OGL "Open Government License"London Air Quality NetworkReference
SurbitonCC BY 4.0jronceroLow-cost
Tower Hamlets - King Edward Memorial ParkUK OGL "Open Government License"London Air Quality NetworkReference
Tower Hamlets - Victoria ParkUK OGL "Open Government License"London Air Quality NetworkReference
SurbitonCC BY 4.0CleanAirSurbLow-cost
Queens RoadCC BY 4.0AirGradientLow-cost
RichmondCC BY 4.0AirGradientLow-cost
Kensington and Chelsea - Station WalkUK OGL "Open Government License"London Air Quality NetworkReference
Kensington and Chelsea - Station WalkUK OGL "Open Government License"London Air Quality NetworkReference
HaringeyCC BY 4.0AirGradientLow-cost
LondonCC BY 4.0AirGradientLow-cost
Kingsland BasinCC BY 4.0AirGradientLow-cost
Dalberg Road, Brixton, LondonCC BY 4.0AirGradientLow-cost
WhitechapelCC BY 4.0AirGradientLow-cost
Horseferry RoadCC BY 4.0AirGradientLow-cost
Horseferry RoadCC BY 4.0AirGradientLow-cost
Mill Hill Engel Park CC BY 4.0AirGradientLow-cost
TwickenhamCC BY 4.0AirGradientLow-cost
TW2CC BY 4.0AirGradientLow-cost
HornseyCC BY 4.0AirGradientLow-cost
Mansford EstateCC BY 4.0AirGradientLow-cost

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in United Kingdom

Birmingham 3.5Westbury 2.9Manchester 2.9Cambridge 1.5

30-day averages, µg/m³. All of United Kingdom →

Updated 2026-10-01 07:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.