Learning how to identify industrial sources of pollution

Here's a good example from our 8 PurpleAir sensors on Gabriola Island of industrial pollution affecting the entire region. We're guessing that this is pollution from the Harmac mill in Nanaimo given the shape of the curve, distribution and timing at different sensors with those located closer to the mill spiking first. There was a uniform increase in levels across all sensors between 7-8PM tonight. This rules out other sources like domestic wood burning although a more detail-oriented eye will see those spikes as well within individual patterns - it may also suggest the arrival of an inversion.



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