What is aqi in weather: The Air Quality Index ( AQI

The Air Quality Index ( AQI ) was developed to make sense of how clean or polluted the air is, helping us make informed choices about our health. But what do those numbers on the AQI scale mean, and ... The Air Quality Index (AQI) is a nationally uniform color-coded index used to report and forecast daily air quality. It includes six color-coded categories, each corresponding to a range of index values. AQI is a measurement of air pollutant concentrations and health risks in ambient air. Learn how AQI is calculated, what categories and colors represent, and how it differs from other systems. An air quality index ( AQI ) is an indicator of how polluted the air is or how polluted it is forecast to become. It is based on air pollutant concentrations and health effects, and varies by country and pollutant.