Since continuous monitoring commenced in 2006 PM10 exceedances have steadily reduced in number. In 2006 there were 35 days where PM10 was greater than 50 ug/m3. Over the last 5 years (2018-2022) the average number of exceedances of the 50 ug/m3 guideline has been 5 days. This has ranged from a high of 12 exceedances in 2018 to no exceedances in 2022.
Seasonal variation
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PM10 |
PM2.5 |
Wind speed (km/h) |
Air temperature (℃) |