Stricter PM10 (particles smaller than 10 μm) standards became effective in 2015. The allowable limit is now 75 μg/m3 and operations are allowed four exceedances per year per monitoring site. In 2016, PM10 dust emission levels remained within the legally allowable limits at Kolomela and Thabazimbi; however, dust emission levels, specifically PM10 emissions, continue to pose a challenge at Sishen.

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