Air quality in the Upper Hunter was generally good during spring 2020. Daily particle levels were within national benchmarks 99% of the time at Muswellbrook and Singleton. Hourly particle levels were in the good to fair air quality categories 99.5% and 99.9% of the time at Muswellbrook and Singleton, respectively. Regional air quality was greatly improved compared to 2019.
First published in March 2021; reprinted March 2021 with amendment to Figure 4.