Air Quality in Castro Valley, United States

Clear
30.4°C · 47.1% humidity
30.4°
Feels 33.2°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
66 stations

Nearby Monitoring Stations

AQI Forecast
34 6am
54
54
25 9am
21
22
24 12pm
32
32
33 3pm
33
33
34 6pm
27
27
34 9pm
34
34
27 12am
34
34
27 3am
27
27
AD 728×90

Air Quality Index Trend

45h · 110 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.

47.1%
Humidity
36.8 km/h
Wind W
1016.0 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
6.02 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Castro Valley?

Temperature & Precipitation

PM2.5 Trend

45h · 110 stations
PM2.56.02 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (66 stations within 25 km)
6.02
Median
6.02
Average
1.93
Low
7.63
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +1.3

What is the 7-day forecast for Castro Valley?

09-05
30.8° 14.0°
09-06
33.4° 14.4°
09-07
35.8° 10.2°
09-08
34.1° 12.1°
09-09
29.0° 15.2°
09-10
30.2° 12.7°
09-11
26.8° 15.6°
0.19 mm
Both models agree Avg diff: 4.8°C

Where are air quality stations near Castro Valley?

26
Grass Valley ES
7.4 km PM2.5: 6.3 µg/m³
24
Madison Park Academy HS
8.8 km PM2.5: 5.8 µg/m³
24
Reach Academy ES
8.9 km PM2.5: 5.7 µg/m³
26
Esperanza ES
9.1 km PM2.5: 6.2 µg/m³
20
Elmhurst United MS
9.1 km PM2.5: 4.7 µg/m³
21
Oakland - East, Alameda, California
9.1 km PM2.5: 5.0 µg/m³
26
Lifers 105th
9.2 km PM2.5: 6.2 µg/m³
27
Oakland Academy of Knowledge (OAK) ES
9.5 km PM2.5: 6.4 µg/m³
25
Lifers 98th
9.6 km PM2.5: 5.9 µg/m³
26
Rudsdale Continuation HS
9.9 km PM2.5: 6.2 µg/m³

What cities are near Castro Valley?

25 Hayward 25 San Lorenzo 25 San Leandro 25 San Ramon 25 Moraga 26 Alameda 18 Pleasanton 25 Oakland 25 Orinda 24 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 2026-09-05T16:36 UTC.