Air Quality in Castaic, United States

Windy
32.2°C · 22.6% humidity
32.2°
Feels 32.2°
60
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast Calibrated
22 4pm
32
32
60 7pm
52
46
42 10pm
39
37
36 1am
35
34
33 4am
33
33
33 7am
32
32
32 10am
32
32
32 1pm
32
32
Station readings
22
32
CAMS model adj -22
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

46h · 2 stn

Castaic's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Castaic is 1.1× the WHO 24-hour guideline of 15 µg/m³.

22.6%
Humidity
43.4 km/h
Wind SSW
1010.2 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
60
16.35 µg/m³
PM10
38
41.15 µg/m³
050100150200300500

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.5 Trend

46h · 2 stations
PM2.516.35 µg/m³ ×1.1 WHO
Moderate
PM1041.15 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for Castaic?

08-03
36.9° 20.1°
08-04
32.7° 22.2°
08-05
35.3° 18.6°
08-06
35.7° 14.2°
08-07
32.3° 17.9°
08-08
33.0° 16.4°
08-09
34.7° 14.1°
Both models agree Avg diff: 3.9°C

Where are air quality stations near Castaic?

15
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 3.6 µg/m³
67
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 19.7 µg/m³
46
Piru - Pacific, Ventura, California
19.6 km PM2.5: 11.0 µg/m³
30
Canyon Creek OEC (1211)
20.9 km PM2.5: 7.1 µg/m³
20
Porter Ranch Cmty Sch (2303)
22.1 km PM2.5: 4.7 µg/m³
15
Castlebay Ln ES (2881)
22.8 km PM2.5: 3.7 µg/m³
23
Van Gogh ES (7422)
23.1 km PM2.5: 5.6 µg/m³
34
Herrick Ave ES (4515)
24.2 km PM2.5: 8.2 µg/m³
53
Simi Valley - Cochran Street, Ventura, California
24.3 km PM2.5: 13.1 µg/m³
42
DA GOAT
25.4 km 32.6°C 43.0% RH PM2.5: 10.0 µg/m³

What cities are near Castaic?

23 Valencia 23 Stevenson Ranch 23 Santa Clarita 23 Canyon Country 23 Sylmar 23 Chatsworth 59 Simi Valley 23 San Fernando 63 Fillmore 23 Northridge
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T02:05 UTC.