AddAir quality in Castro Valley
Air quality index (AQI⁺) and PM2.5 air pollution in Castro Valley • 22.5K Followers • 07:00, Oct 31 Local time
11
US AQI⁺Good
Main pollutant:
PM2.5
2.1 µg/m³
12°
3 km/h
99 %
Hourly forecast
Castro Valley air quality index (AQI⁺) forecast
Daily forecast
Castro Valley air quality index (AQI⁺) forecast
| Today | 17 |  | 17° 11° |  14 km/h | 84% |
| Sun | 46 | | 16° 10° | 12 km/h | 78% |
| Mon | 41 |  | 19° 11° | 6 km/h | 49% |
Air pollutants
What is the current air quality in Castro Valley?
PM2.5 concentration currently meets the WHO annual PM2.5 guideline.
Health recommendations
 Enjoy outdoor activities |
 Open your windows to bring clean, fresh air indoors Get a monitor |
Protect yourself from air pollution in Castro Valley
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 Castro Valley today?
Index
Low
 Tree Low | 25% |
 Grass None | 0% |
 Weed Low | 25% |
Source:
wetter.comHealth recommendations
Enjoy outdoor activities |
Open your windows to bring clean, fresh air indoors Get a monitor |
Pollen
What is the pollen count in Castro Valley today?
Index
Low
Tree Low | 25% |
Grass None | 0% |
Weed Low | 25% |
Source:
wetter.comProtect yourself from air pollution in Castro Valley
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.
Most polluted locations near Castro Valley
Worldwide AQI⁺ ranking
Station ranking
Real-time AQI⁺ station ranking for stations in Castro Valley
Historic air quality near Castro Valley
History
Historic air quality graph for Castro Valley
Historic air quality near Castro Valley
History
Historic air quality graph for Castro Valley
Most polluted locations near Castro Valley
Worldwide AQI⁺ rankingStation ranking
Real-time AQI⁺ station ranking for stations in Castro Valley
Measure your own air quality
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