Air quality in Singapore mostly unhealthy; PM2.5 elevated in four regions

Air quality across Singapore was reported as mostly unhealthy, with elevated levels of PM2.5 recorded across four regions. According to the National Environment Agency, the 24-hour Pollutant Standards Index (PSI) on Monday was expected to fall within the unhealthy range, registering between 101 and 190.

The elevated pollutant levels and the resulting unhealthy air quality index serve as an immediate environmental concern for residents, prompting advisories regarding public health and outdoor activities as monitored by national environmental authorities.