Air quality has been mostly moderate, but there have been spikes in PM2.5 levels across most regions due to haze. The haze has caused fluctuations in air quality, with PM2.5 levels increasing in many areas.

Further information on the current air quality situation is available from The Business Times. They have reported on the haze and its impact on air quality, providing details on the affected regions.

For the most up-to-date information, readers can refer to The Business Times for more details on the air quality and haze situation.