Air Quality in Castaic, United States

Windy
33.7°C · 23.5% humidity
33.7°
Feels 33.7°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
8 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
26 11am
25
16
36 2pm
33
30
28 5pm
7
2
2 8pm
1
1
1 11pm
4
4
4 2am
4
4
4 5am
4
4
4 8am
4
4
Station readings
26
25
16
10
CAMS model adj -30
54
54
54
54
54
54
54
34
27
27
27
27
27
34
34
34
34
34
34
34
34
34
34
34
AD 728×90

Air Quality Index Trend

48h · 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.

23.5%
Humidity
78.4 km/h
Wind SW
1005.5 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
36
8.65 µg/m³
PM10▲
38
41.15 µg/m³
050100150200300500

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations
PM2.58.65 µg/m³ ✓ WHO
Good
PM1041.15 µg/m³
Good
UV INDEX24.9
Extreme
AD 300×250
Station readings (8 stations within 25 km)
8.65
Median
8.39
Average
7.15
Low
10.6
High
PM2.5 µg/m³ · Model: 16.35 · Bias: +7.7

What is the 7-day forecast for Castaic?

07-21
30.9° 24.4°
07-22
33.7° 21.2°
07-23
32.0° 20.3°
1.81 mm
07-24
36.1° 20.8°
0.19 mm
07-25
33.3° 23.5°
07-26
37.4° 19.1°
07-27
37.5° 21.9°
Both models agree Avg diff: 3.6°C

Where are air quality stations near Castaic?

25
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 6.0 µg/m³
60
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 16.4 µg/m³
77
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 24.5 µg/m³
57
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 15.0 µg/m³
58
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 15.4 µg/m³
28
Piru - Pacific, Ventura, California
19.6 km PM2.5: 6.7 µg/m³
30
Canyon Creek OEC (1211)
20.9 km PM2.5: 7.2 µg/m³
32
Porter Ranch Cmty Sch (2303)
22.1 km PM2.5: 7.6 µg/m³
34
Castlebay Ln ES (2881)
22.8 km PM2.5: 8.1 µg/m³
32
Van Gogh ES (7422)
23.1 km PM2.5: 7.8 µg/m³

What cities are near Castaic?

35 Valencia 36 Stevenson Ranch 38 Santa Clarita 36 Canyon Country 34 Sylmar 29 Chatsworth 32 Simi Valley 35 San Fernando 23 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 2026-07-21T21:48 UTC.