Canadian AHQI question

Hello,

I live in Kamloops, BC. On days that looks smoky I go to Purple Air as well as the Canadian Government’s AHQI website to check the air quality readings.
Lately, today included, it’s smoky outside. The air is tinted orange and it smells like a campfire everywhere outside.
When I look at Purple Air today it’s been reading (so far) at 1-3, low risk. What I’m seeing and smelling outside doesn’t seem to match.
On Purple Air’s live map when I change it to another set of data like the US EPA, or the Australian PM 2.5 it’s reading as much higher and more dangerous levels.

What’s going on?

Thanks for your time

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