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Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 04:00 on Saturday 20th April 2024
- Low22
- Moderate0
- High0
- Very High0
- No Data0
- 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
Hillingdon Hayes
Parameter | Pollution Band | Concentration | Period |
---|---|---|---|
PM10 Particulate matter (PM10) Updated: 19/04/2024 24:00 |
Low (Index 2) | 17 µg/m3 (Ref.eq) | 24 Hour mean |
Oxides of Nitrogen (NOXasNO2) Updated: 19/04/2024 24:00 |
not applicable | 9 µg/m3 | hourly mean |
Nitrogen dioxide (NO2) Updated: 19/04/2024 24:00 |
Low (Index 1) | 7 µg/m3 | hourly mean |
Nitric Oxide (NO) Updated: 19/04/2024 24:00 |
not applicable | 1 µg/m3 | hourly mean |
Note: These results are based on provisional data. The data are presented in graphical form based on the highest pollutant measured at each site.