Haze update for Sept 23: Showers expected tomorrow, 24-hour PSI forecast moderate to low-unhealthy range
Air quality again remained in the moderate range on Wednesday (Sept 23) as rain fell across some parts of Singapore.At 7pm, the 24-hour Pollutant Standard Index (PSI) ranged between 58 to 67 — in the moderate range — with western Singapore recording the highest reading of 67.Meanwhile, one-hour PM2.5 is in the normal band for all regions, except in western Singapore, which had a concentration reading on 58 — in the elevated band.In its daily haze situation update on Wednesday evening, the National Environment Agency (NEA) said the 24-hour PSI forecast for Singapore is expected to be in the moderate to low-unhealthy range.It noted that dry conditions have persisted over southern Sumatra and parts of Kalimantan, with moderate to dense smoke plumes observed from fires in those areas.Data from the ASEAN Specialised Meteorological Centre show that the number of hotspots in Kalimantan rose to 304 on Sept 22, up from the 198 a day earlier.NEA said that while dry conditions are forecast over south-eastern Sumatra and other parts of Kalimantan on Thursday, showers are expected over Singapore and parts of its surround region.