A NSW Government website

Types of air pollution

Special projects monitoring

We monitor air quality for relatively short periods as special projects.

Special projects monitoring is carried out at some locations to meet special needs, usually but not always for relatively shorter periods.

  • Incident monitoring may occur in response to incidental or emergency air pollution situations. Monitoring is often short-term, ranging from a few days to a few months, and is commissioned to assess air quality impacts of incident-related air emissions.
  • Roadside monitoring collects air quality data near major roads with high traffic volumes. This monitoring will provide data to help build knowledge of road traffic emissions, validate predictive models and to support assessment of public health benefits of proposed interventions to reduce air pollution.
  • Research project monitoring serves specific research projects, where the monitoring period can vary significantly across projects, but is often longer than an incident monitoring activity.

Monitoring locations and data reporting

Locations of air pollutants monitored at special monitoring stations are determined by individual project requirements. Data are reported hourly as air quality category (AQC) ratings :

  • Incident monitoring data and information, including locations, is presented on this website .
  • Roadside monitoring station measures multiple pollutants including particulate matter as PM10 and PM2.5, visibility, and gaseous pollutants (oxides of nitrogen, carbon monoxide, and sulphur dioxide).

Note that this data is not used for demonstrating compliance with the National Environment Protection (Ambient Air Quality) Measure (NEPM) as they are not representative of general population exposure.

Notes on special projects monitoring data

Air quality measurements at special projects air quality monitoring stations are not used for demonstrating compliance with the NEPM. As an example, roadside air quality is particularly affected by particulate matter and gaseous pollutants from motor vehicles; as such this data provides insight into air quality near major roads with high traffic volumes and is not appropriate for reporting general population exposure.