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Primary air pollutant in the Watertown area:
PM2.5 - 48 Good
Enjoy your outdoor activities.
Other Pollutants:
OZONE - 43 Good
Primary Pollutant: PM2.5 - 53 Moderate
Secondary Pollutant: OZONE - 51 Moderate
Primary Pollutant: PM2.5 - 44 Good
Secondary Pollutant: OZONE - 41 Good