Singapore Haze Eases, Air Quality Turns Moderate
Singapore Haze Eases, Air Quality Turns Moderate
Anonymous
Key Points
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The western region peaked at a PSI of 106 at 10am on Sept. 20, while the eastern region reached 102 at 3am before falling to 79 by 7pm; the northern and southern regions remained moderate at 71 and 75, respectively.
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In Singapore’s central region, hourly PM2.5 rose sharply on Sept. 19 from 67 at 11am to 117, then 149 at noon, before easing to 141 at 1pm when the region’s PSI reached 102.
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The central region covers areas including Thomson, Marymount, Sin Ming, Ang Mo Kio, Bishan, Serangoon Gardens, MacRitchie and Toa Payoh.
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Brunei began incorporating PM2.5 concentrations into its PSI readings on Sept. 1 and issued haze-related PSI updates five times daily, at 7am, 9am, 11am, 2pm and 4pm.
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Brunei’s health authorities said normal outdoor activity could continue at moderate PSI levels, but advised children, pregnant women and older people to reduce strenuous or prolonged outdoor activity; people with heart or lung conditions were advised to limit such activity and seek care for persistent breathing symptoms.
Singapore's air quality improved to moderate levels by the evening of September 20, easing earlier unhealthy readings that had prompted health warnings SG Headlines. The central region remained at the upper edge of moderate with a PSI of 100, while the western region peaked at 106 earlier in the day Yahoo Singapore. The haze originated from fires burning in Indonesia's Kalimantan and southern Sumatra, with dry conditions and southeasterly winds expected to keep pollution risks elevated in the coming days SG Headlines.
Central Singapore Remains at Elevated Moderate Levels
The central region experienced sharp PM2.5 spikes on September 19. Hourly readings jumped from 67 micrograms at 11am to 117, then spiked to 149 at noon SG Headlines. By evening September 20, the region's PSI settled at 100, keeping it at the unhealthy-moderate border Yahoo Singapore. The affected areas include Thomson, Marymount, Ang Mo Kio, Bishan, and Toa Payoh.
Other Regions Recover Faster From Morning Peak
The eastern region hit 102 PSI at 3am but fell sharply to 79 by 7pm Yahoo Singapore. The western region peaked at 106 at 10am before improving. The northern and southern regions remained moderate throughout, at 71 and 75 respectively SG Headlines. This uneven pattern reflects how the smoke drifted across the island overnight before dissipating.
Brunei's Air Remains Stable as Health Guidance Clarified
Brunei's air quality stayed moderate nationwide, with Belait recording the highest PSI at 92 SG Headlines. Starting September 1, Brunei incorporated PM2.5 measurements into its PSI index and now issues updates five times daily. Brunei's health authorities clarified that normal outdoor activity is safe at moderate levels, though children, pregnant women, older people, and those with heart or lung conditions should limit strenuous activity SG Headlines.
Recent Weeks Show Volatile Air Quality Pattern
Singapore's PSI has swung between moderate and unhealthy levels over recent weeks. One day saw all five regions reach unhealthy status simultaneously — the first time since 2019 SG Headlines. The volatility underscores the region's vulnerability to seasonal fire activity in Indonesia during dry periods. Authorities continue advising vulnerable populations to monitor readings and adjust outdoor plans accordingly.
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