WHO PM2.5 standard

Data
1

Hi there I am excited to have a PA sensor running at my home at last.. Can I ask - why is there not a AQ standard for the WHO PM2.5 recommendations? Am I missing something?

thanks for any comments

John

2

There is a data layer for WHO PM2.5 AQG and Interim Targets in the drop down. The next box is Apply conversion with choices of either ‘no’ or others. Do you need to make a selection in this field, also, in order to have the WHO standards display on the map going forward?

3

Thank you Mary for this - yes i found this layer and its great having the interim levels color coded. I am not sure whether to use a conversion or not. An air scientist in our city uses the woodsmoke conversion.. obviously the number changes with a conversion so its important to have the correct one chosen? if in doubt is it best to use no? If i select this data layer and 24 hr averages we seem to pretty much fail the WHO recommendation night after night in winter quite badly, but so do other cities / countries.. so it seems to be quite a hard target?

thanks!