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Compliance Dashboard
Note: This dashboard only shows data from the monitoring sites at Heathrow Airport.
The data below is updated automatically each day and shows how the monitoring sites within the network are progressing against national objectives.
Dashboard Overview
The PM10 and NO2 dials show the monitoring site with the highest number of exceedances and may change each month according to the data.
Progress through the
current year
Day 255 of 366
PM10 Exceedances
to date
London Harlington
3 exceedances
-- 35 exceedances allowed
Average NO2 concentration
to date
London Hillingdon Oxford Avenue
26.3 µgm-3
-- 40 µgm-3 Limit Value
