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Hourly forecast
331-379 US-20, Waltham air quality index (AQI⁺) forecast
Daily forecast
331-379 US-20, Waltham air quality index (AQI⁺) forecast
| Today | 54 |  | 31° 20° |  16 km/h |  71% |
| Sat | 36 | | 32° 20° | 18 km/h | 37% |
| Sun | 44 | | 33° 18° | 24 km/h | 37% |
Air pollutants
What is the current air quality near 331-379 US-20?
PM2.5 concentration is currently 2.5 times the World Health Organization annual PM2.5 guideline value.
Health recommendations
 Sensitive groups should reduce outdoor exercise |
 Close your windows to avoid dirty outdoor air Get a monitor |
 Sensitive groups should wear a mask outdoors Get a mask |
 Sensitive groups should run an air purifier Get an air purifier |
Real-time 331-379 US-20, Waltham air pollution map
Pollen
What is the pollen count in 331-379 US-20 today?
Index
Moderate
 Tree Low | 25% |
 Grass Moderate | 50% |
 Weed Low | 25% |
Source:
wetter.comProtect yourself from air pollution in 331-379 US-20
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Pollen
What is the pollen count in 331-379 US-20 today?
Index
Moderate
Tree Low | 25% |
Grass Moderate | 50% |
Weed Low | 25% |
Source:
wetter.comHistoric air quality near 331-379 US-20
History
Historic air quality graph for 331-379 US-20
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Most polluted locations near 331-379 US-20, Waltham
Worldwide AQI⁺ ranking
Station ranking
Real-time 331-379 US-20 AQI⁺ station ranking
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