Air Quality in Castaic, United States

Clear
28.4°C · 48.7% humidity
28.4°
Feels 30.6°
35
Good
Air quality is satisfactory. Enjoy outdoor activities.
8 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
31 5am
28
40
35 8am
20
20
20 11am
20
20
20 2pm
20
20
20 5pm
0
0
0 8pm
0
20
20 11pm
20
20
20 2am
20
20
Station readings
31
28
40
CAMS model adj -34
66
66
66
66
54
54
54
54
54
54
54
54
54
27
34
34
34
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

47h · 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.

48.7%
Humidity
38.6 km/h
Wind SW
1016.4 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
35
8.36 µg/m³
PM10▲
38
41.15 µg/m³
050100150200300500

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.58.36 µg/m³ ✓ WHO
Good
PM1041.15 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (8 stations within 25 km)
8.36
Median
8.17
Average
5.57
Low
11.0
High
PM2.5 µg/m³ · Model: 19.2 · Bias: +10.8

What is the 7-day forecast for Castaic?

09-05
31.0° 20.2°
09-06
36.5° 19.1°
09-07
35.8° 19.3°
09-08
35.5° 13.9°
09-09
33.9° 17.2°
09-10
33.2° 12.9°
09-11
40.2° 19.4°
Both models agree Avg diff: 4.9°C

Where are air quality stations near Castaic?

43
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 10.3 µg/m³
38
Piru - Pacific, Ventura, California
19.6 km PM2.5: 9.1 µg/m³
30
Piru - Pacific, Ventura, California
19.6 km PM2.5: 7.2 µg/m³
23
Canyon Creek OEC (1211)
20.9 km PM2.5: 5.6 µg/m³
34
Porter Ranch Cmty Sch (2303)
22.1 km PM2.5: 8.2 µg/m³
30
Castlebay Ln ES (2881)
22.8 km PM2.5: 7.1 µg/m³
31
Van Gogh ES (7422)
23.1 km PM2.5: 7.4 µg/m³
36
Herrick Ave ES (4515)
24.2 km PM2.5: 8.6 µg/m³
46
Simi Valley - Cochran Street, Ventura, California
24.3 km PM2.5: 11.0 µg/m³
53
DA GOAT
25.4 km 18.3°C 89.0% RH PM2.5: 13.0 µg/m³

What cities are near Castaic?

36 Valencia 37 Stevenson Ranch 40 Santa Clarita 36 Canyon Country 32 Sylmar 34 Chatsworth 32 Simi Valley 36 San Fernando 25 Fillmore 36 Northridge
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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 2026-09-05T15:52 UTC.