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Primary air pollutant in the Watertown area:
PM2.5 - 10 Good
Enjoy your outdoor activities.
Other Pollutants:
PM10 - 4 Good
Primary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Good