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Primary air pollutant in the Helena area:
OZONE - 31 Good
Enjoy your outdoor activities.
Other Pollutants:
PM2.5 - 27 Good
PM10 - 12 Good
Saturday-Monday: A trough will move eastward through the central US on Saturday and a surface low ahead of it will push a cold front through the area early Sunday morning. Cloud cover will increase ahead of the trough and front on Saturday with rain possible overnight. Cloud cover will decrease on Sunday behind the front with surface high pressure building into the area and spanning across the eastern US by Monday. PM2.5 is expected to be in the yellow range on Saturday and in the green range on Sunday and Monday. Ozone is expected to be in the green range through Monday. ML
Primary Pollutant: PM2.5 - 52 Moderate
Secondary Pollutant: OZONE - 44 Good
Primary Pollutant: OZONE - 38 Good
Secondary Pollutant: PM2.5 - 25 Good
Primary Pollutant: OZONE - 44 Good
Secondary Pollutant: PM2.5 - 37 Good