Air & Weather
PSI
Singapore's live 24-hour Pollutant Standards Index (PSI) by region, with NEA's health-descriptor band and the pollutant sub-indices behind it — refreshed automatically from data.gov.sg / NEA.
Current readings
Last checked 1 second ago (NEA reports a new 24-hour PSI reading roughly hourly).
114
Unhealthy118
Unhealthy134
Unhealthy111
Unhealthy101
UnhealthySub-index breakdown (below each PSI number): the individual pollutant readings — PM2.5, PM10, SO₂, CO, O₃ — that the headline PSI is the highest of.
Today's trend
Every hourly PSI reading reported so far today, plotted automatically — no search needed.
Look up a specific date
See every hourly PSI reading and a trend chart for one day.
PSI (Pollutant Standards Index) is the highest of five 24-hour pollutant sub-indices — PM2.5, PM10, SO₂, CO, and O₃ — computed for each of five general regions of Singapore, as reported by the National Environment Agency via data.gov.sg. Bands: 0–50 Good, 51–100 Moderate, 101–200 Unhealthy, 201–300 Very Unhealthy, 301+ Hazardous.