Heathrow Airwatch uses cookies to make the site simpler. Find out more about this
Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 02:00 on Monday 23rd April 2018
- Low9
- Moderate0
- High0
- Very High0
- No Data16
- 25
Total monitoring sites





Hounslow Gunnersbury
Parameter | Pollution Band | Concentration | Period |
---|---|---|---|
PM10 Particulate matter (PM10) Updated: 22/04/2018 20:00 |
No Data | 24 Hour mean | |
Oxides of Nitrogen (NOXasNO2) Updated: 22/04/2018 21:00 |
No Data | hourly mean | |
Nitrogen dioxide (NO2) Updated: 22/04/2018 21:00 |
No Data | hourly mean | |
Nitric Oxide (NO) Updated: 22/04/2018 21:00 |
No Data | 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.