Yishun Singapore air quality readings

Yishun is assigned to NEA’s North air-quality reporting region. The readings below cover that region, not a monitor in Yishun. See NEA’s area guide.

US AQI · PM2.5

127Unhealthy for Sensitive Groups

Official NEA PSI: 89

Calculated from NEA’s 24-hour PM2.5 concentration using US AQI breakpoints. Not an official all-pollutant AQI or NowCast. Calculation details

Saved reading

The north region's latest available PSI is 89 (moderate). NEA reports this regional value independently of the other four regions.

24-hour PSI
89Saved reading
1-hour PM2.5 (µg/m³)
39Saved reading

The Woodlands Waterfront Park artwork illustrates the region. It is not a monitoring station location or a live view of visibility.

US AQI (PM2.5) is calculated from NEA’s 24-hour PM2.5 concentration. It is not an official all-pollutant AQI or NowCast.

Each row shows the latest available observation for that region. PSI and PM2.5 can have different observation times. Missing readings stay unavailable.

Air quality across all five regions
RegionUS AQI · PM2.524-hour PSI1-hour PM2.5 (µg/m³)
South153UnhealthySaved reading103UnhealthySaved reading53Saved reading
Central165UnhealthySaved reading122UnhealthySaved reading83Saved reading
North127Unhealthy for Sensitive GroupsSaved reading89ModerateSaved reading39Saved reading
East153UnhealthySaved reading104UnhealthySaved reading69Saved reading
West174UnhealthySaved reading136UnhealthySaved reading111Saved reading

What does the 24-hour PSI mean?

NEA's Pollutant Standards Index (PSI) combines six air pollutants. The 24-hour PSI describes air quality over the preceding day; it is not an instant measurement of the air outside. Use NEA's official advisories for activity planning.

How is 1-hour PM2.5 different?

PM2.5 measures the concentration of fine particles in micrograms per cubic metre (µg/m³). The 1-hour reading reflects more recent changes. It is a concentration, not a PSI score, and PSI categories must not be applied to it.

Sources and observation times

Readings come from Singapore's National Environment Agency through data.gov.sg. The interactive view checks every five minutes. The observation time is when the measurement was recorded, not when you opened the page. Readings at least two hours old are labelled as older readings. If the source fails, saved observations keep their original dates and are labelled as saved readings.

Haze Monitor is independent of NEA. Regional readings do not describe conditions at an exact address. Singapore PSI and Malaysia API use different calculations and are not interchangeable.

NEA readings and advisories · Singapore Open Data Licence

Singapore neighbourhoods

Neighbourhood pages use their NEA reporting region. Local conditions can differ within a region.

Explore each region

Malaysia air quality · Singapore country overview

North region · NEA regional reading

Yishun Singapore air quality and haze

US Air Quality Index (AQI) · PM2.5

127

Yishun uses NEA’s North regional reading. This is not a measurement within Yishun.

Some live NEA readings could not be loaded. Saved observations keep their original timestamps.

Air qualityUnhealthy for Sensitive Groups
GoodHazardous

PM2.5 · 24-hour average · How this is calculated

North region · 20 Oct 2026, 14:00 SGTSaved reading · Reading time unavailable

Official NEA PSI: 8920 Oct 2026, 14:00 SGT

1-hour PM2.5 39 µg/m³20 Oct 2026, 14:00 SGT · Saved reading · Reading time unavailable
NEA Singapore ↗
About Yishun Singapore air quality

The main number is PM2.5 US AQI calculated from NEA’s 24-hour PM2.5 concentration. It is not an official all-pollutant AQI or NowCast. Official PSI and 1-hour PM2.5 are shown separately. Region readings are not measurements at the illustrated landmark. We check every five minutes and flag readings at least two hours old.

PSI and Malaysia's API use different calculations. PM2.5 is a concentration in µg/m³, not an index. The Woodlands Waterfront Park scene is an illustration, not a live camera view.

Data from data.gov.sg under the Singapore Open Data Licence. See NEA's official advisories for activity planning.

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Singapore regions

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