Haze is an atmospheric phenomenon caused by dust, smoke, and dry particles that obscure the sky's clarity. While not common in Singapore, it can occur during the Southwest Monsoon season from June to September. Haze@SG is a useful tool that provides hourly updates on the Pollutant Standards Index (PSI), offering a clear indicator of air pollution levels.

The 1-hour PM2.5 concentrations, reflecting averaged levels over an hour, offer insights into current air quality. These levels can fluctuate, especially during transboundary haze periods, and are influenced by weather conditions. The app features access to hourly AQI and PM2.5 readings, as well as PSI data across Singapore from NEA, helping users understand the implications of PSI levels and receive notifications when air quality reaches unhealthy levels.

Developed independently of NEA, the app aims to provide reliable information and enhance user experience. Regular updates are encouraged for optimal performance, and feedback can be shared via email. With features like sharing air quality data with friends and family, the app promotes awareness and safety during haze episodes. Users can customize notifications and stay informed about air quality changes to protect their well-being.