Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Pollen count and allergy info for Castro Valley
Castro Valley pollen and allergy report
Today's Pollen Count in Castro Valley
Low
Air quality
Air quality of Castro Valley today
| AQI US AQI | Good | |
| PM2.5 µg/m³ | Good |
3D animated air pollution map
Allergy forecast
Castro Valley pollen count forecast
| Day | Index | Tree | Grass | Weed | Wind | Weather | Temperature |
|---|---|---|---|---|---|---|---|
| Today | Low | Low | None | None |  8.9 mp/h |  | 71.6° 46.4° |
| Wednesday, May 1 | Very high | Very high | Low | None | 8.9 mp/h |  | 69.8° 48.2° |
| Thursday, May 2 | Very high | Very high | Low | None | 8.9 mp/h | | 68° 48.2° |
AQI US, Metric