PSI or PM2.5? What air quality measures should I refer to when there is haze?
During haze, the 1-hour PM2.5 reading shows current air quality and helps plan immediate outdoor activities, while the 24-hour PSI forecast guides planning for the next day.
Intelligence analysis by Llama
During haze, refer to the PM2.5 values if you want to go outdoors within the hour, and refer to the PSI forecast if you are planning an outdoor activity the next day.
Imagine your lungs are like a sponge that can get clogged up with bad air. During haze, the air is full of tiny particles that can make you sick. To stay safe, check the air quality before going outside and plan your activities accordingly.
Analysis
Current Air Quality: PM2.5 Readings
During haze, the 1-hour PM2.5 reading is the most critical measure of current air quality. It indicates the concentration of fine micro-pollutants in the air, which can cause respiratory problems and other health issues. The National Environment Agency (NEA) provides real-time PM2.5 readings on its website, which can be used to plan immediate outdoor activities.
Planning Ahead: 24-hour PSI Forecast
The 24-hour PSI forecast is a crucial tool for planning outdoor activities during haze episodes. It indicates what the air quality is expected to be in the next 24 hours, allowing individuals to make informed decisions about their activities. The PSI forecast is computed based on the daily average concentration of six pollutants, including PM2.5, sulphur dioxide, carbon monoxide, and ozone.
Protecting Yourself During Haze
During haze, it is essential to take precautions to protect yourself and your loved ones. If the PM2.5 readings are high, avoid strenuous outdoor activities for the next hour. Vulnerable individuals, such as seniors, pregnant women, children, and patients with lung and heart disease, should avoid all outdoor activities. N95 masks are not needed for short periods of exposure, such as commuting to work, but are recommended under certain conditions, such as when a healthy person must be outdoors for several hours when the air quality is in the hazardous range.
Staying Informed
To stay informed about air quality during haze episodes, refer to the NEA's website for real-time PM2.5 readings and the 24-hour PSI forecast. The NEA also provides a personal guide on its website, which outlines the necessary precautions to take during haze episodes.
Key points
- Refer to the 1-hour PM2.5 reading for current air quality and to plan immediate outdoor activities.
- Use the 24-hour PSI forecast to plan outdoor activities for the next day.
- Avoid strenuous outdoor activities during high PM2.5 readings.
- Vulnerable individuals should avoid all outdoor activities during haze episodes.
- N95 masks are not needed for short periods of exposure, but are recommended under certain conditions.
If the haze clears quickly, air quality is expected to improve, and outdoor activities can resume without restrictions.
If the haze persists, air quality may worsen, and vulnerable individuals may need to take more stringent precautions to protect themselves.
