With the wind out of the south east at several points today the distinctive odour of the Sovereign Harbour Sewage Works was noticeable. But that was not the only unpleasant thing in the air today.
According to my SDS011 particulate matter sensor PM2.5 and PM10 levels were especially high again. See the graphs below and note the peaks at just under 100ug/m³ for PM2.5, and hitting 110ug/m³ for PM10. Ouch. 24hr floating average has hit 70 ug/m³ for PM2.5, which is Very High on the DAQI.