This dataset describes observations made of air quality by sensors distributed in Ballarat.The information was collected in real time by the sensors.The intended use of the information is to inform the public of the historical measured observations of air quality in Ballarat.The dataset is typically updated every 15 minutes.The City of Ballarat is not an official source of weather information. These observations are provided to the public for informative purposes only. Use other channels for official meteorological observations and forecasts.