Air Quality Charts
Daily air quality charts
Air quality results are provided online daily via the graphs (below) showing the following information:
One hour rolling average in-stack data for CO, NO2, PM2.5 and PM10
For both of the EastLink tunnel ventilation stacks
For a 24-hour period.
A line on each graph shows the EPA Licence Limit where applicable.
The graphs are updated each day. It should be noted that all emissions from the EastLink tunnels during normal operations between 5am and 9pm Mon-Fri and between 7am and 9pm Sat-Sun (excluding emergency situations which may involve fire and smoke management) are via the stack and there are no emissions from the tunnel portals during these times.
All the data in published graphs are unvalidated. These data may be adjusted at a later time through a standardised procedure to account for instrument errors, power interruptions and the like.
Carbon Monoxide - Stacks
Oxides of Nitrogen - Stacks
Nitrogen Dioxide - Stacks
PM10 - Stacks
PM2.5 - Stacks