Quote: Actually the truth of the matter is far more damning: there was no health advisory for PM2.5 concentrations before 22 June 2013. There were only 24-hour PM2.5 readings which NEA published three times a day – at 8 am, 12 pm and 4 pm. And there was a health advisory for PM10 readings only. It was only when NEA published their new PSI webpage after TRE published my article that another health advisory – for PM2.5 – appeared. Even so, the new PM2.5 advisory does not match up to American AQI standards for it is missing a crucial category: 301-500 Hazardous! It is also missing the American AQI’s useful colour coding scheme. Most importantly, it is missing the American AQI’s convenient descriptor: Good, Moderate, USG (Unhealthy for Sensitive Groups), Unhealthy, Very Unhealthy, Hazardous. Last but not least, take a look at NEA’s Historical PSI Readings for 20 June 2013 [Link]. This is when the 3-hour PSI hit a record 400 at 11 am and another record 401 at 12 pm. What do you now see? 169-196 Overall! Now tell me NEA and MEWR are not trying to smoke Singaporeans!
Posted on: Wed, 26 Jun 2013 10:36:47 +0000
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