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Singapore 1-Hour Pollutant Standards Index (PSI)
We provide you with up-to-date PSI data calculated using 1-hour PM2.5 concentrations. We have scoped our focus on the main air pollutant, PM2.5.
This is to provide near real-time information for planning immediate activities such as jogging and to to assist making better sense of PM2.5 readings by converting them to PSI scale.
The 1h-PSI based on PM2.5 concentrations is the PM2.5 PSI sub-index, calculated according to NEA methodology, but with the current PM2.5 reading instead of a 24h average.
(0 - 50)
(51 - 100)
(101 - 200)
(201 - 300)
Want to know where the haze comes from?
The HazeTracker map provides hotspot information from NASA’s MODIS satellite, wind direction, and the boundaries of oil palm and pulpwood concessions in Indonesia. The map also features a map layer from NUS’s CRISP imaging centre that displays the latest (2015) land use data for Indonesia’s peatland areas, as analysed from satellite images.
Hotspot: satellite detection of an area with high temperature. Hotspots come with a confidence level and “high-confidence” hotspots represent fires.
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