The air quality index (AQI) is a measure that quantifies the level of air pollution and its impact on public health. Some synonyms for AQI include the pollution index, air pollution level, air pollution index, and air quality rating. These terms all convey the same idea as AQI and are used interchangeably at times. It is crucial to monitor the AQI as pollutants in the air can cause respiratory problems and other health issues. Governments and organizations worldwide use AQI to ensure that the public is aware of the air quality and can take preventive measures when needed. Keeping the AQI in check is critical to preserving the environment and maintaining good health.