Singapore keeps options open on action against firms over haze as PSI hits 203

Singapore’s air quality deteriorated as smoke from regional forest fires caused repeated haze episodes. The 24-hour PSI in western Singapore reached 203 at 9pm, entering the “very unhealthy” range for the first time in this episode. The article identifies western Singapore as the hardest-hit area mentioned.

The worsening air affected people across Singapore, but authorities focused on vulnerable residents. Eligible groups included senior citizens, pregnant women, children, teenagers and people with medical conditions such as asthma. Officials also noted that hourly PM2.5 readings had risen sharply, particularly in the west.

Singapore began distributing N95 masks on Oct 14, earlier than planned. It also opened air-conditioned spaces at community clubs and selected residents’ committee centres. These steps offer protection and relief while authorities assess the haze and hope Indonesia can contain the fires causing it.

The Pollutant Standards Index, or PSI, is a numerical system used to describe air quality. It combines pollution information into a single reading that helps the public understand whether outdoor air is clean, unhealthy or dangerous. Higher readings indicate greater pollution and greater concern for health.

Singapore’s 24-hour PSI in the west reached 203 at 9pm. The article states that this crossed into the “very unhealthy” range. That classification means people should take the pollution seriously, especially those more sensitive to dirty air. The reading was also notable because it was the first very unhealthy reading during the current haze episode.

Authorities responded by distributing N95 masks and opening air-conditioned spaces. These measures reduce exposure while haze persists. The PSI does not identify the source of pollution by itself, so officials separately examine satellite, wind and weather information to assess whether fires could affect Singapore.

Singapore’s Transboundary Haze Pollution Act allows penalties against companies linked to fires outside Singapore when those fires cause unhealthy air in the country. The law targets companies found responsible for, or having condoned, fires that create the specified pollution conditions. It gives Singapore a legal route beyond diplomatic requests and regional cooperation.

The maximum daily fine is S$100,000. However, the total penalty is capped at S$2 million. The law applies when the fires cause unhealthy air quality in Singapore for at least 24 hours. Authorities must therefore assess whether the legal conditions have been met before taking action.

Singapore is currently evaluating data collected during the haze episode and considering its options under the Act. Officials examine satellite data, wind conditions and meteorological information. These checks help connect fires with smoke reaching Singapore before authorities decide whether companies may be held responsible.

Singaporean authorities do not rely on air-quality readings alone when examining responsibility for transboundary haze. They investigate whether fires in another country could have sent smoke into Singapore. This matters because the Transboundary Haze Pollution Act applies to companies connected with fires that cause unhealthy air in Singapore.

Officials assess satellite data to locate and track fires. They also examine wind conditions and meteorological information. Together, these sources show where fires occurred, how smoke may have moved, and whether the timing fits Singapore’s pollution readings. The article says authorities use this information to determine whether smoke could reach Singapore.

The government is assessing data from the current episode and considering possible action under the Act. Singapore has experienced several haze episodes since Sept 4 that crossed the law’s specified air-quality threshold. Any future action would depend on the evidence gathered through this assessment.

Haze in the “very unhealthy” range can irritate the eyes, nose and throat and make breathing harder. Fine particles can worsen asthma and other respiratory conditions. Children, older adults, pregnant women and people with existing medical problems may be more sensitive, which explains why Singapore prioritised these groups.

The article reports that western Singapore’s 24-hour PSI reached 203. Hourly PM2.5 readings also rose sharply, especially in the west. In response, authorities began distributing N95 masks on Oct 14. Properly fitted N95 masks can filter much of the fine particulate pollution people might otherwise breathe.

Singapore is also opening air-conditioned spaces at community clubs and selected residents’ committee centres. These provide relief from smoky outdoor conditions and help people reduce exposure. The measures began earlier than planned because air quality deteriorated. They are temporary protections while officials monitor the haze and assess its source.

El Niño is a weather pattern that can bring unusually dry conditions to some regions. When rain is limited, vegetation, soil and peat lose moisture. Dry fuel catches fire more easily than wet material. This can increase the chance that land-clearing or accidental fires will grow and produce heavy smoke.

Peat fires can be especially difficult because they may burn below the surface. They can smoulder through dry organic soil and reignite after appearing controlled. Dry forests and peatlands also give flames more available fuel. Wind can spread fire and carry smoke over long distances, although the article does not describe specific fire behaviour.

Minister Grace Fu said El Niño-linked dry conditions had made the situation particularly challenging. Singapore hopes Indonesia can contain the fires and remains willing to help. Regional cooperation through Asean was also urged, showing that the problem extends beyond one country’s borders.

PM2.5 refers to fine particulate matter with a diameter of 2.5 micrometres or less. These particles are much smaller than ordinary visible dust. In haze, they can remain suspended in air and move with smoke over considerable distances. The article identifies PM2.5 as the fine particulate matter monitored by Singaporean authorities.

Because PM2.5 particles are so small, people can inhale them past the nose and upper airways. They may reach deep parts of the lungs, irritate lung tissue and worsen conditions such as asthma. Some particles can also trigger inflammation. These health effects are established science, although the article itself does not detail the biological process.

Hourly PM2.5 readings rose sharply during the episode, particularly in western Singapore. That increase prompted earlier distribution of N95 masks and the opening of air-conditioned spaces. Both measures aim to reduce people’s exposure while the haze continues.