Choa Chu Kang Singapore air quality readings

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

US AQI · PM2.5

163Unhealthy

Official NEA PSI: 119

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

The west region's latest available PSI is 119 (unhealthy). NEA reports this regional value independently of the other four regions.

24-hour PSI
119
1-hour PM2.5 (µg/m³)
70

The Jurong Lake Gardens 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)
South158Unhealthy112Unhealthy59
Central163Unhealthy119Unhealthy63
North144Unhealthy for Sensitive Groups97Moderate55
East163Unhealthy118Unhealthy68
West163Unhealthy119Unhealthy70

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

West region · NEA regional reading

Choa Chu Kang Singapore air quality and haze

US Air Quality Index (AQI) · PM2.5

163

Choa Chu Kang uses NEA’s West regional reading. This is not a measurement within Choa Chu Kang.

Air qualityUnhealthy
GoodHazardous

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

West region · 30 Sept 2026, 07:00 SGTReading time unavailable

Official NEA PSI: 11930 Sept 2026, 07:00 SGT

1-hour PM2.5 70 µg/m³30 Sept 2026, 07:00 SGT · Reading time unavailable
NEA Singapore ↗
About Choa Chu Kang 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 Jurong Lake Gardens 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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