St Marys air quality monitoring station

The St Marys air quality monitoring station is located on residential property off Mamre Road, St Marys. It is situated in the centre of the Hawkesbury basin in a semi-rural area.

Air quality monitoring region: Sydney north-west

Commissioned: October 1992

Elevation: 29 metres

Using data from this station, we provide hourly pollutant concentrations, 24-hour summary and an Air Quality Index (AQI).

The following air pollutants and meteorological variables are currently measured at St. Marys:

  • Ozone (O3)
  • Oxides of nitrogen (NO, NO2 and NOx)
  • Visibility using nephelometry
  • Fine particles as PM10
  • Fine particles as PM2.5
  • Wind speed, wind direction and sigma theta
  • Ambient temperature
  • Relative humidity