Since continuous monitoring commenced in 2006, PM10 exceedances of the 50 ug/m3 guideline have steadily reduced in number. In 2006 there were 35 days where PM10 was greater than 50 ug/m3. From 2018-2022, the average number of exceedances was 5 days. This has ranged from a high of 12 exceedances in 2018 to one exceedance in 2022. There were no exceedances in 2023, 2024, or 2025.
Seasonal variation
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PM10 |
PM2.5 |
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