Air Quality in Castro Valley, United States

Cloudy
8.9°C · 86.6% humidity
8.9°
Feels 5.1°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
65 stations

Nearby Monitoring Stations

AQI Forecast
27 5pm
34
34
20 8pm
24
27
29 11pm
30
31
32 2am
26
26
26 5am
27
27
25 8am
25
24
24 11am
24
24
24 2pm
24
25
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.

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▲
20
4.79 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Castro Valley?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.54.79 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (65 stations within 25 km)
4.79
Median
4.83
Average
3.26
Low
7.56
High
PM2.5 µg/m³ · Model: 7.0 · Bias: +2.2

What is the 7-day forecast for Castro Valley?

06-09
19.5° 8.9°
06-10
29.5° 11.8°
06-11
30.7° 15.8°
06-12
28.9° 11.9°
06-13
23.2° 9.2°
06-14
27.3° 12.0°
06-15
24.5° 10.5°
Both models agree Avg diff: 5.0°C

Where are air quality stations near Castro Valley?

20
Grass Valley ES
7.4 km PM2.5: 4.7 µg/m³
18
Madison Park Academy HS
8.8 km PM2.5: 4.3 µg/m³
20
Esperanza ES
9.1 km PM2.5: 4.7 µg/m³
20
Elmhurst United MS
9.1 km PM2.5: 4.9 µg/m³
46
Oakland - East, Alameda, California
9.1 km PM2.5: 11.0 µg/m³
18
Oakland - East, Alameda, California
9.1 km PM2.5: 4.3 µg/m³
20
Lifers 105th
9.2 km PM2.5: 4.8 µg/m³
20
Oakland Academy of Knowledge (OAK) ES
9.5 km PM2.5: 4.8 µg/m³
20
Lifers 98th
9.6 km PM2.5: 4.7 µg/m³
21
Rudsdale Continuation HS
9.9 km PM2.5: 5.0 µg/m³

What cities are near Castro Valley?

20 Hayward 20 San Lorenzo 20 San Leandro 20 San Ramon 20 Moraga 20 Alameda 16 Pleasanton 20 Oakland 20 Orinda 21 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 2026-06-09T03:51 UTC.