A "swarm" of low-cost sensors showing differences in air quality

Just as quickly as the air pollution tanked into the hazarous zone this past week, it has rebounded over the past few hours.

Here's an example from our network of PurpleAir sensors on Gabriola Island of this rapid improvement, and escape (perhaps temporarily) from the forest fire woodsmoke blanketing much of the province.


Is the air quality on Gabriola Island good right now? It depends on where you are. Note the air pollution stratification with parallel poor readings on Vancouver Island. This is only a difference of around 5km (North to South).



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