Keywords: PM10, PM25, fine particulates, legislation, measurement, control
PM10 and PM2.5 - legislation, measurement and control
New standards for PM10 and PM2.5 in ambient air are being formulated in Europe and the USA. There is much controversy over this legislation, not only with respect to the stringent limits proposed, but also due to the many problems associated with ensuring compliance with standards for a pollutant which is so poorly understood. New sampling and analysis techniques are being developed to improve the understanding of PM10 and PM2.5. Existing pollution control systems already control much of the emissions from coal-fired power plants which may be precursors of fine particulates. New and emerging technologies may reduce these emissions even further.