Add
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 | 53 |  | 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 2.9 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
Monitor the air you breathe
Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.
Medical grade air purifiers
Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.
Powerful, stylish air purifiers
Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.
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
Measure your own air quality
Get a monitor and contribute air quality data in your city.
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
Get comprehensive data about air quality in 331-379 US-20, Waltham
Download our Air Quality App
