Air Quality in Castro Valley, United States
Cloudy
8.9°C · 86.6% humidity
8.9°
Feels 5.1°
22
Good
Air quality is satisfactory. Enjoy outdoor activities.
65 stations
Nearby Monitoring Stations
AQI Forecast
34
8pm
34
34
22
11pm
25
28
30
2am
24
25
25
5am
26
26
24
8am
25
24
24
11am
24
24
24
2pm
24
25
25
5pm
24
25
Air Quality Index Trend
48h · 1 stnCastro Valley's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
86.6%
Humidity
29.8 km/h
Wind SSW
1017.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.32 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Castro Valley?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.55.32 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (65 stations within 25 km)
5.32
Median
5.3
Average
2.75
Low
9.75
High
PM2.5 µg/m³ · Model: 7.1 · Bias: +1.8
Both models agree
Avg diff: 5.0°C
Where are air quality stations near Castro Valley?
22
Grass Valley ES
20
Madison Park Academy HS
22
Esperanza ES
23
Elmhurst United MS
15
Oakland - East, Alameda, California
17
Oakland - East, Alameda, California
23
Lifers 105th
22
Oakland Academy of Knowledge (OAK) ES
23
Lifers 98th
23
Rudsdale Continuation HS
What cities are near Castro Valley?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T06:49 UTC.