Air Quality in Castro Valley, United States

Clear
32.4°C · 18.3% humidity
32.4°
Feels 32.4°
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
63 stations

Nearby Monitoring Stations

AQI Forecast
27 10am
27
34
30 1pm
34
34
34 4pm
34
34
34 7pm
34
34
54 10pm
54
54
54 1am
54
34
34 4am
34
34
34 7am
34
34
AD 728×90

Air Quality Index Trend

48h · 1 stn

Castro 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.

18.3%
Humidity
26.5 km/h
Wind WSW
1008.3 hPa
Pressure
29.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
30
7.13 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Castro Valley?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.57.13 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX29.9
Extreme
AD 300×250
Station readings (63 stations within 25 km)
7.13
Median
7.2
Average
3.55
Low
9.2
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +0.2

What is the 7-day forecast for Castro Valley?

07-21
32.4° 10.9°
07-22
31.3° 14.8°
07-23
28.7° 17.7°
07-24
35.5° 12.8°
07-25
29.4° 14.4°
07-26
33.7° 10.7°
07-27
32.7° 12.9°
Both models agree Avg diff: 5.1°C

Where are air quality stations near Castro Valley?

28
Grass Valley ES
7.4 km PM2.5: 6.6 µg/m³
28
Madison Park Academy HS
8.8 km PM2.5: 6.6 µg/m³
30
Esperanza ES
9.1 km PM2.5: 7.2 µg/m³
22
Elmhurst United MS
9.1 km PM2.5: 5.3 µg/m³
72
Oakland - East, Alameda, California
9.1 km PM2.5: 22.1 µg/m³
26
Oakland - East, Alameda, California
9.1 km PM2.5: 6.2 µg/m³
32
Lifers 105th
9.2 km PM2.5: 7.6 µg/m³
26
Oakland Academy of Knowledge (OAK) ES
9.5 km PM2.5: 6.2 µg/m³
33
Lifers 98th
9.6 km PM2.5: 7.9 µg/m³
26
Rudsdale Continuation HS
9.9 km PM2.5: 6.3 µg/m³

What cities are near Castro Valley?

30 Hayward 30 San Lorenzo 30 San Leandro 30 San Ramon 30 Moraga 32 Alameda 22 Pleasanton 32 Oakland 30 Orinda 29 Foster City
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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 2026-07-21T20:48 UTC.