WoW!!! May have even found the reason for the spikes on may 24th as well.
https://www.netc.com/bb/viewtopic.php?f=23&t=1218Wildfires will "re-mobilize" many forms of pollution / radiation absorbed (and sequestered) in plants. We've even witnessed mercury from factories and coal fired power plants being sent back into the air and dispersed over large areas during wildfires.
Beta stations will pick up this material and the rises ARE legitimate readings.
Be cautious during haze events as the smoke will contain all kinds of pollution absorbed by the forest (sometimes over many years).
Keep windows closed and don't exercise outside during these events.
Here's more on the current situation:
http://cwfis.cfs.nrcan.gc.caHopefully the jet stream will cooperate and give you some relief soon.