The South African government has contracted environmental monitoring company SI Analytics to measure the pollution levels for the five-year, R12,5-million Highveld priority area project, which started in August 2008. 

The areas of eastern Gauteng and western Mpumalanga are the second priority area, after the Vaal triangle, as these exceed ambient air-quality standards and negatively impact on air quality and human health. 

The Highveld priority area was declared an air pollution hot spot in terms of Section 18(1) of the National Environmental Management: Air Quality Act of 2004. Air-quality management initiatives had to be considered to tackle the challenge of pollution, such as the establishment of air monitoring stations to provide a better indication of current air quality. 

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