 In December 2019, the air quality index (AQI) around Rozelle, a west suburb of Sydney, hit 2,552 or more than 12 times the hazardous level of 200.The level of fine particle matters, known and measured globally as PM2.5, around Sydney was also measured at or the equivalent of 37 cigarettes.On 1 January 2020, the AQI around Monash, a suburb of Canberra, was measured at 4,650, or more than 23 times hazardous level and peaked at 7,700.