The table below contains the current readings for four monitoring stations, outside the tunnel. A map of these monitoring stations is included in the above links. For graphs, historical readings, and downloadable air quality reports use the links above.

For more information about air quality improvements click on 'M5 East and tunnel filtration' (above right).

Current external real time air quality readings (at the following monitoring stations external to the tunnel)	Nitrogen dioxide (hourly average in micrograms per cubic metre)	Particulate matter (PM10) (24 hourly average in micrograms per cubic metre)	Carbon monoxide (1 hour average in parts per million)	Wind direction (hourly average)	Wind speed (hourly average in kilometres per hour)
Time/date	10/02/2010 1pm - 2pm	09/02/2010	10/02/2010 1pm - 2pm	10/02/2010 1pm - 2pm	10/02/2010 1pm - 2pm
Set limit or goal	256	50	No set limits or goals for these
Cnr Jackson Place and Highcliff Road, Undercliffe (U1)	12.3	12	0.26	ENE	16
Cnr Walker Street and Thompson Street, Turrella (T1)	12.3	15	0.26	ENE	12
Cnr Wavell Parade and David Street, Earlwood (X1)	16.4		0.20	ENE	8
Gipps Street Lookout, Bardwell Park - community based monitoring station (CBMS)	12.3	14	0.23	NE	21