Singapore air turns unhealthy again as haze from Kalimantan fires persists
Air quality in central Singapore slipped back into the unhealthy range on Saturday evening, with the 24‑hour Pollutant Standards Index (PSI) reaching 104, the National Environment Agency (NEA) said.
Source: Malay Mail · September 27, 2026 at 7:32 AM · AI-assisted report
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SINGAPORE, 27 SEPTEMBER 2026 —
Air quality in central Singapore slipped back into the unhealthy range on Saturday evening, with the 24‑hour Pollutant Standards Index (PSI) reaching 104, the National Environment Agency (NEA) said.
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The NEA’s haze situation update noted that the 24‑hour PSI forecast for Saturday was expected to stay in the moderate to low‑unhealthy band, while one‑hour PM2.5 concentrations were recorded at 110 µg/m³ in the central region, 88 µg/m³ in the east, 82 µg/m³ in the west and 67 µg/m³ in the south. Only the northern part of Singapore remained in the normal band at 50 µg/m³.
The agency attributed the rise to moderate to dense smoke haze drifting from fires in Indonesia’s Kalimantan, with additional smoke plumes observed from southern Sumatra. Prevailing south‑easterly or south‑westerly winds were identified as a factor that could carry the haze into Singapore, and dry conditions were expected to persist over southern Sumatra and the southern and eastern parts of Kalimantan.
The NEA reminded the public that health impacts depend on individual health status, PSI level and the duration and intensity of outdoor activity. It advised that when PM2.5 readings fall in the elevated band, people should cut back on strenuous outdoor activity for the next hour, and that vulnerable groups – the elderly, pregnant women, children and those with chronic lung or heart disease – should avoid such activity.
If readings move into the high band, all healthy persons should refrain from strenuous outdoor activity, while vulnerable persons should avoid any outdoor exposure.
The agency’s warning underscores the cross‑border nature of haze episodes, which can affect air quality and public health in neighboring Malaysia, prompting authorities there to monitor the situation closely and advise residents accordingly.
Related: National Environment Agency · Singapore