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Utah Air Monitoring Program: Air Pollution Forecast History

What are the forecast levels?
Ozone - 8 hr average (Summer)
Voluntary 0.068 ppm
Mandatory 0.075 ppm
Yellow 0.068 ppm
Red 0.075 ppm
PM 2.5 - 24 hr average (Winter)
Voluntary (2012) 15 ug/m3
Mandatory (2012) 25 ug/m3
Yellow 25.5 ug/m3
Red 35.5 ug/m3