Central Singapore 1-hour PM2.5 hits 113 as PSI nears unhealthy range
Singapore's air quality worsened on Monday morning, with the 24-hour PSI reading between 78 and 99 at 11am, just inside the moderate range. Central Singapore was haziest before noon, when the one-hour PM2.5 reading reached 113. NEA advises the public to cut prolonged outdoor exertion if the 24-hour PSI enters the unhealthy range.