Haze update Oct 12: Singapore's 24-hour PSI forecast to stay in unhealthy range

Singapore's air quality remained in the unhealthy range throughout Monday (Oct 12) afternoon, with one-hour PM2.5 readings in the elevated band across the city state.At 7pm, the 24-hour Pollutant Standards Index (PSI) ranged from 118 in northern Singapore to 155 in the western and central regions.Readings in southern and eastern Singapore were 122 and 139 respectively,Meanwhile, one-hour PM2.5 concentrations ranged from 93 in the eastern region to 135 in western Singapore.The next highest concentration reading was 115 in central Singapore.In its daily haze situation update on Monday, the National Environment Agency (NEA) said that moderate to dense smoke plumes continued to be observed from fires in Kalimantan and southern Sumatra, while smoke haze was also observed drifting towards Singapore.And while rain is forecast over Singapore and parts of the surrounding region, the agency pointed out that dry conditions are expected to persist over parts of southern Sumatra and Kalimantan."Smoke haze may continue to drift towards Singapore under the prevailing easterly or southeasterly winds.