The Australia - Western Australia Air Monitoring Report 2015 presents the results of the air quality surveillance activity in the region for 2015. The report includes an overview of the monitoring system, information on the air quality parameters being measured by each station, and the methods of data collection for each of the pollutants surveyed. Tables in the report are to the monitor station (site) level and include annual and exceedance summaries, and daily peak one-hour and eight-hour statistics on the following pollutants: carbon monoxide, nitrogen dioxide, photochemical oxidants, sulfur dioxide, lead, and particulate matter less than 10 and 2.5 microns. However, not all stations monitor the same pollutants. An appendix with monthly exceedance summaries by station is also included in the report. Assessments on exceedance of pollutants are made against the National Environment Agency's Ambient Air Quality standards. While most data in the report are for 2015, select tables cover 2006-2015.