{"id":85180,"date":"2026-09-15T19:47:00","date_gmt":"2026-09-15T11:47:00","guid":{"rendered":"https:\/\/sgbuzz.com\/?p=85180"},"modified":"2026-09-15T19:47:00","modified_gmt":"2026-09-15T11:47:00","slug":"why-singapores-central-region-has-the-worst-air-quality-during-haze","status":"publish","type":"post","link":"https:\/\/sgbuzz.com\/?p=85180","title":{"rendered":"Why Singapore\u2019s central region has the worst air quality during haze"},"content":{"rendered":"


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SINGAPORE – Singapore has been experiencing hazy conditions for over a week since air quality in the central region first dipped to unhealthy levels<\/span><\/a> on Sept 4.<\/p>\n

Since then, the central region has consistently registered the highest Pollutant Standards Index (PSI) and PM2.5 readings in the five regions used for air quality monitoring \u2013 north, south, east, west and central.<\/p>\n

The PSI is a measure of air quality in Singapore, and readings of over 100 reflect unhealthy air quality.<\/p>\n

Under such conditions, healthy people should reduce prolonged or strenuous outdoor activities, while those with chronic heart and lung disease should avoid such activities.<\/p>\n

PM2.5 readings refer to concentrations of fine particulate matter that is the dominant pollutant during periods of transboundary haze.<\/p>\n

For instance, the PSI in central Singapore reached a high of 154 at daybreak on Sept 1<\/span><\/a>5. Other regions registered readings of between 104 and 128 at that time.<\/p>\n

At 5pm on the same day, the PSI in the central region dropped slightly to 133. The west and east regions also recorded unhealthy air, with the values between 114 and 116, while the PSI in the north and south dipped to moderate levels at 92 and 94 respectively.<\/p>\n

The central region includes the Thomson, Marymount, Sin Ming, Ang Mo Kio, Bishan, Serangoon Gardens, MacRitchie and Toa Payoh areas, according to the National Environment Agency (NEA) website.<\/p>\n