Większość populacji może nie odczuwać negatywnych objawów.ġ50-200: Niezdrowe - Każdy może zacząć doświadczać negatywnych skutków zdrowotnych U osób wrażliwych mogą wystąpić poważniejsze skutki zdrowotne.Ģ00-300: Bardzo niezdrowe - Ostrzeżenie zdrowotne, poziom alarmowy. Wartości Indeksu Jakości Powietrza (AQI) Poziomy zagrożenia zdrowiaĠ-50: Dobra - Jakość powietrza jest uznawana za zadowalającą, a zanieczyszczenie powietrza stanowi niewielkie ryzyko lub jego brak.ĥ0-100: Średnia - Jakość powietrza jest dopuszczalna jednak niektóre zanieczyszczenia mogą być umiarkowanie szkodliwe dla bardzo małej liczby osób, które są niezwykle wrażliwe na zanieczyszczenie powietrza.ġ00-150: Niezdrowe dla wrażliwych osób - u osób wrażliwych mogą wystąpić negatywne skutki dla zdrowia. And this explains why the values are different between the NEA website and the World Air Quality Index project. This PSI++, that is commonly referred as AQI (or Air Quality Index), is what is being used on the the World Air Quality Index project, for all the cities (provided PM2.5 is available for the city). In which case, the PSI++ would be the maximum of the regular PSI (based on PM10 only) and the PM2.5 AQI: So, based on the PM2.5 AQI conversion, the PSI that is used for Singapore could be extended (let's call it PSI++) to also take into account the PM2.5 information. If you select the PM2.5 (1), then enter the mass concentration of 48 (2), can click on Calculate, you will obtain the AQI of 132 (3). The easiest way to do the conversion is to use the online calculator, available at : This conversion however exists, and is defined by the US Environmental Protection Agency. a conversion from the PM2.5 mass to a Pollution or Quality Index). This data is provided in μg/m3 only (see 2), and there is no conversion to something like the PSI (i.e. This said, the interesting thing is that, in this same table, the PM2.5 data is also provided in the last column (see 3). PSI(Singapore-North) = max( PSI PM10-based. The PSI is evaluated as the maximum of the individual PSI for each of the pollutants: PM 10, SO 2, NO 2, O 3 (Ozone) and CO 2. The value 67(/59) can be read as 67 μg/m3, corresponding to a PSI of 59. In the image above, number 1 corresponds to the PM10 value that is used for the PSI evalation.
![roznica miedzy amount i number roznica miedzy amount i number](https://www.eslprintables.com/previews/232506_1-Talking_about_quantity.jpg)
With the recent Southeast Asia Smog from Indonesia affecting Singapore and now Malaysia, we got many questions about why there is a difference between the data which can be read from Singapore NEA website ( ) and the World Air Quality Index project Singapore webpage.įor instance, here is what can be read today in NEA website:įor some historical reason, Singapore is using the PSI ( Pollutant Standard Index) to evaluate the Air Quality. In April 2014, the Singapore NEA has updated the PSI calculation to also include PM 2.5. Please note that this article was orginally written in June 2013.