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High concentrations of dust or PM is a serious health concern. pm 2.5 is less than 2.5 microns in diameter, and pm 10.0 is less than 10 microns in diameter. This means, a pm 10.0 report includes pm 2.5 as well. Both these particles are much smaller than a human hair, which is about 70 microns in width.
pm 10.0 Operations such as stone crushing, coal grinding, rotary kilning in cement industry and dust on road stirred by moving vehicles can increase pm 10.0 levels. pm 10.0 limit for 24-hour average is 150㎍/㎥.
pm 2.5 This is a result of fine particles produced from all types of combustion, including motor vehicles, thermal power plants, residential wood burning, forest fires, agricultural burning and other industrial processes. pm 2.5 limit for 24-hour average is 35㎍/㎥.