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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° |  25 km/h |  54% |
| Sun | 47 | | 27° 15° | 28 km/h | 61% |
| Mon | 27 |  | 26° 13° | 24 km/h | 38% |
Air pollutants
What is the current air quality near 331-379 US-20?
PM2.5 concentration is currently 2.7 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 Moderate | 50% |
 Grass Moderate | 50% |
 Weed Low | 25% |
Source:
wetter.comProtect yourself from air pollution in 331-379 US-20
Air Purifiers
Face Masks
Air Quality Monitors
Pollen
What is the pollen count in 331-379 US-20 today?
Index
Moderate
Tree Moderate | 50% |
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
City ranking
Real-time USA AQI⁺ city ranking
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