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Air Quality Monitoring
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Local Air Quality Management
Air quality monitoring
Current measured levels
Overview of monitoring in Hillingdon
Download air quality data
Industrial air pollution control
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Current measured levels

Select the monitoring site and the summary from the list below and to display the latest information:

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Details for London Hillingdon Harmondsworth Os

Today's Air Pollution levels are: Low (Index 1)
Pollution levels are Index 1
at 24:00 on 24/04/2024
Note: These results are based on provisional data. The data are presented in graphical form based on the highest pollutant measured at each site.

Current Levels for London Hillingdon Harmondsworth Os are:

ParameterConcentrationUnitBandLast updated
GE10 9µg/m3 (INDIC GRAV) Low (1)  24/04/2024 24:00
PM1 2µg/m3 (Osiris)   24/04/2024 24:00
PM25 4µg/m3 (Osiris) Low (1)  24/04/2024 24:00
TSP 10µg/m3 (Osiris)   24/04/2024 24:00