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Primary air pollutant in the Watertown Town area:
PM2.5 - 56 Moderate
If you are unusually sensitive to particle pollution, consider reducing your activity level or shorten the amount of time you are active outdoors.
Other Pollutants:
PM10 - 10 Good
OZONE - 15 Good
Primary Pollutant: PM2.5 - 70 Moderate
Primary Pollutant: PM2.5 - 60 Moderate
Primary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Good