Air quality in Singapore sees slight improvement; 1-hour PM2.5 readings elevated in three regions - CNA

SINGAPORE — Air quality in Singapore saw a slight improvement overnight into Wednesday (Oct 21), with 1-hour PM2.5 readings falling into the normal range in all five regions at 1pm, according to the National Environment Agency (NEA).

In the central region, 1-hour PM2.5 levels fluctuated overnight, dipping into the normal band at 3am and rising again at 7am. Meanwhile, the reading in the east climbed into the elevated band at 6am before returning to normal by 7am. The hourly PM2.5 levels in the north briefly entered the elevated range at 12pm before falling back to normal.

The National Environment Agency said the 24-hour PSI is expected to range from 110 to 180 on Wednesday.