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Compliance Dashboard

Note: This dashboard only shows data from the monitoring sites at Heathrow Airport.


Summary (year to date)

Monitoring Site Annual mean (µgm-3) Data Capture Number of hours exceeding Max hourly exceedance (µgm-3)
Heathrow Green Gates 18.6 97.1 0 n/a
Heathrow Oaks Road 18.0 99.6 0 n/a
London Harlington 18.9 99.5 0 n/a
London Hillingdon Oxford Avenue 28.1 67.3 1 209.9

Exceedance history (year to date)

Number Date Monitoring Site Max exceeding
1 09/05/2024 London Hillingdon Oxford Avenue 209.9