Welcome to Clean Air Network’s Pollution Alert Service (BETA). Please enter your email, then choose the air quality monitoring stations from which you would like to receive alerts when the Hong Kong Government API exceeds 100. The Government monitors air quality with a network of 14 stations, of which only 3 are roadside monitors.
Roadside emissions harm human health the most.
Although the standards on which the API are based are more than 20 years old, we have, for the time being, decided to align our alert system with the Government’s warnings. Because of how outdated the API is, air quality readings below 100 do NOT indicate that the air is healthy to breathe. Rather, Hong Kong’s maximum pollutant guidelines presently permit 2-4 times the pollutant levels recommended by the WHO.
What we do know is that air quality above 100 is definitely HAZARDOUS to human health.
Please Note: This email alert service is in beta and may be subject to minor changes to improve service and performance.