Under the Clean Air Act, the US limits primary particle pollution to an average of 12 micrograms per cubic meter of air a year for particles measuring less than 2.
What does ug/m3 stand for?
ug/m3 stands for Micrograms per Cubic Meter of Air
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Samples in periodicals archive:
5) standard from 15 micrograms per cubic meter of air ([mu]g/[m.
The revised standard, which will take effect in 2015, lowers the 24-hour exposure to PM from 65 micrograms per cubic meter of air to 35 micrograms.
The suit said that EPA scientists recommended lowering the acceptable level for airborne soot--particulate matter emitted from motor vehicle exhaust, factory and power plant emissions and wood fires--to 13 or 14 micrograms per cubic meter of air, down from the 15-microgram level now in affect.
The new standard lowers OSHA's permissible exposure limit for hexavalent chromium from 52 to 5 micrograms per cubic meter of air as an 8-hour time-weighted average.
0 micrograms per cubic meter of air established in February 1997.
The mercury emissions will drop from the permitted level of 410 micrograms per cubic meter of air to 65 micrograms.