Is Below 200 Truly a ‘Good Day’ for Air Quality?
The Air Quality Index (AQI) has long served as a simple, public-facing tool to communicate daily air quality and the associated health risks. Standard AQI categories such as Good (0-50), Satisfactory (51-100), Moderate (101-200), Poor (201-300), and so on, are based on established scientific understanding of how pollution affects human health. Importantly, for most national…