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Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 10:00 on Thursday 28th March 2024
- Low21
- Moderate0
- High0
- Very High0
- No Data1
- 22
Total monitoring sites
Low (1-3)
Moderate (4-6)
High (7-9)
Very High (10)
Offline | Find out more about the air pollution index and bandings
Offline | Find out more about the air pollution index and bandings
Slough Colnbrook
Sorry, no data are available for this monitoring site on the date selected
Note: These results are based on provisional data. The data are presented in graphical form based on the highest pollutant measured at each site.