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Primary air pollutant in the Watertown area:
PM2.5 - 25 Good
Enjoy your outdoor activities.
Other Pollutants:
OZONE - 23 Good
Primary Pollutant: PM2.5 - 50 Good
Secondary Pollutant: OZONE - 38 Good
Primary Pollutant: PM2.5 - 41 Good
Secondary Pollutant: OZONE - 35 Good