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).

West

120

Unhealthy

O₃: 13 · PM10: 76 · PM2.5: 120 · CO: 11 · SO₂: 5

East

124

Unhealthy

O₃: 22 · PM10: 86 · PM2.5: 124 · CO: 11 · SO₂: 2

Central

145

Unhealthy

O₃: 19 · PM10: 80 · PM2.5: 145 · CO: 10 · SO₂: 4

North

99

Moderate

O₃: 24 · PM10: 64 · PM2.5: 99 · CO: 11 · SO₂: 3

South

107

Unhealthy

O₃: 12 · PM10: 68 · PM2.5: 107 · CO: 12 · SO₂: 1

Sub-index breakdown (below each PSI number): the individual pollutant readings — PM2.5, PM10, SO₂, CO, O₃ — that the headline PSI is the highest of.

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.