<![CDATA[PM2.5 way too low]]>IQAir_Windy.jpg Windy PM2.5 reports around 71 uG/cm3 for Quebec city YQB. Official government IQAir website report around 170 for same PM2.5 map. Why is it so different ?

]]>https://community.windy.com/topic/40341/pm2-5-way-too-lowRSS for NodeFri, 17 Apr 2026 06:39:42 GMTFri, 06 Jun 2025 14:11:23 GMT60<![CDATA[Reply to PM2.5 way too low on Fri, 06 Jun 2025 16:16:59 GMT]]>@idefix37 Yes you are correct and I am wrong. Sorry about MY own confusion.

Regards

Michel

]]>https://community.windy.com/post/213104https://community.windy.com/post/213104Fri, 06 Jun 2025 16:16:59 GMT<![CDATA[Reply to PM2.5 way too low on Fri, 06 Jun 2025 16:52:35 GMT]]>@bernardmic

This PM2.5 layer in Windy is for the atmosphere but not at ground level.

E1DD7CE0-CACD-4E0B-B73E-CCD3B2DD1E3D.jpeg

Air quality stations are giving the content of PM 2.5 at ground level. So if you want to make a comparison you have to select Air quality stations in the POIs in Windy, displaying PM2.5 in μg/m3.

022D3AFD-7E51-45F6-8FA3-EE8B9C099FC1.jpeg

]]>https://community.windy.com/post/213101https://community.windy.com/post/213101Fri, 06 Jun 2025 16:52:35 GMT<![CDATA[Reply to PM2.5 way too low on Fri, 06 Jun 2025 14:20:51 GMT]]>@bernardmic I meant uG/m3 and not cm3

]]>https://community.windy.com/post/213098https://community.windy.com/post/213098Fri, 06 Jun 2025 14:20:51 GMT