To access historical data: Fuzzy SG

1-hr PM2.5 Unofficial PSI

North - PSI - AQI - - µg/m³
South - PSI - AQI - - µg/m³
East - PSI - AQI - - µg/m³
West - PSI - AQI - - µg/m³
Central - PSI - AQI - - µg/m³

*PSI categorization for PM2.5 are based on 24-hr average (which this chart is NOT), and is included for reference only.

*AQI categorization for PM2.5 are based on 24-hr average (which this chart is NOT), and is included for reference only.

Graphical representation of data available on public domain @ http://www.haze.gov.sg/haze-updates/pollutant-concentrations/type/PM25-1Hr#pollutant

Data is also sourced from: https://www.nea.gov.sg/api/ (registration required)

NEA 24-hr PM2.5 breakpoints http://www.haze.gov.sg/docs/default-source/faq/computation-of-the-pollutant-standards-index-(psi).pdf

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