27 Aug '16, 6am

Overall PSI expected to be in ‘unhealthy’ range, hazy conditions might worsen https://t.co/YL4eq9SEOd

Overall PSI expected to be in ‘unhealthy’ range, hazy conditions might worsen https://t.co/YL4eq9SEOd

Since the early hours of Saturday (Aug. 27), Pollutant Standards Index (PSI) levels in most parts of Singapore has entered the “unhealthy” range. Screenshot from NEA website Air quality is considered unhealthy when they enter PSI range 101-200. PSI readings of 51-100 are considered moderate. PM2.5 readings are also rising steadily. The northern part of Singapore had the highest one-hour PM2.5 reading of 94, as of 10am. Screenshot from NEA website PM2.5 is a fine particle that is the dominant pollutant during the haze season. As the one-hour PM2.5 readings are the average of PM2.5 concentrations over an hour, it can be used as an indicator to plan for immediate activities. The hazy conditions are expected to persist throughout today, and the PSI for the next 24-hours is expected to remain at the unhealthy level, while PM2.5 levels are forecast to fluctuate between “elevated...

Full article: http://mothership.sg/2016/08/overall-psi-expected-to-be-i...

Tweets

Hazy conditions expected to persist today, but air quality may improve in evening: @NEAsg

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