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Singapore haze: PM2.5 readings back to normal islandwide after west briefly enters elevated band

By · Published by Everything Blog

In short

Regional showers across Sumatra, Kalimantan, and Singapore have helped keep atmospheric conditions subdued, sustaining generally manageable air quality since late October. Environmental authorities confirmed that outdoor plans can proceed as usual despite early-morning particle fluctuations in western areas. Residents should monitor real-time hourly pollutant measures alongside full-day forecasts when deciding their physical exertion levels outside. Prevailing winds from the east or southeast are expected to prevent moderate haze over Kalimantan from escalating locally.

Key points

  • Members of the public can safely carry on with their normal outdoor activities based on t…: Members of the public can safely carry on with their normal outdoor activities based on the forecast.
  • Moderate haze remains confined to parts of Kalimantan while surrounding regional rain hel…: Moderate haze remains confined to parts of Kalimantan while surrounding regional rain helps suppress hazy conditions.
  • Vulnerable individuals should completely avoid strenuous outdoor activity if 1-hour PM2.5…: Vulnerable individuals should completely avoid strenuous outdoor activity if 1-hour PM2.5 levels reach the elevated band.

Sources checked by our analysis pipeline: 1

The 24-hour PSI is forecast to be in the moderate range on Sunday, between 51 and 70.

Singapore: 1-hour PM2.5 readings were back in the normal range across Singapore on Sunday (Nov 1), after the reading in the west entered the elevated band earlier in the morning.

At 7am, 1-hour PM2.5 readings ranged from 30 to 55 across the five regions, all within the normal band.

The western region recorded elevated 1-hour PM2.5 readings at 5am and 6am, reaching 59.

At 7am, the 24-hour Pollutant Standards Index (PSI) ranged from 68 to 86, in the moderate range.

The 24-hour PSI is forecast to be in the moderate range on Sunday, between 51 and 70.

Air quality has remained in the good-to-moderate range since 11pm on Oct 25, following an earlier spell of hazy conditions.

In its latest haze advisory on Saturday afternoon, the National Environment Agency (NEA) said moderate haze remained confined over parts of Kalimantan.

It added that showers over Sumatra, Kalimantan, Singapore and the surrounding region were expected to keep the haze situation subdued on Sunday, with prevailing…

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