The first air-quality forecast in Shanghai was released to the public on Sunday.

The new 24-hour forecast includes the Air Quality Index, the pollution level and the primary pollutant, and is available for three time periods during the day: 8 pm to 6 am; 6 am to 12 am; and 12 am to 8 pm.

The time divisions aim to provide more convenient information according to the daily bedtimes and outdoor schedules of residents.