Air Quality in Castaic, United States

Windy
32.3°C · 13.4% humidity
32.3°
Feels 32.3°
50
Good
Air quality is satisfactory. Enjoy outdoor activities.
7 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
34 2pm
35
50
50 5pm
46
24
22 8pm
20
19
39 11pm
38
38
38 2am
37
37
37 5am
37
37
37 8am
37
37
37 11am
37
37
Station readings
34
35
50
33
CAMS model adj -17
54
54
54
54
54
34
34
34
34
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
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.

13.4%
Humidity
56.3 km/h
Wind W
1008.1 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
50
11.96 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations
PM2.511.96 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX6.9
High
AD 300×250
Station readings (7 stations within 25 km)
11.96
Median
11.99
Average
9.2
Low
14.14
High
PM2.5 µg/m³ · Model: 10.85 · Bias: -1.1

What is the 7-day forecast for Castaic?

06-09
32.3° 13.5°
06-10
32.1° 14.3°
06-11
30.5° 14.8°
06-12
31.6° 16.5°
06-13
34.9° 16.1°
06-14
30.4° 18.8°
06-15
26.2° 12.3°
Both models agree Avg diff: 4.0°C

Where are air quality stations near Castaic?

8
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 1.9 µg/m³
17
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 4.1 µg/m³
53
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 13.1 µg/m³
13
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 3.1 µg/m³
8
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 1.9 µg/m³
27
Piru - Pacific, Ventura, California
19.6 km PM2.5: 6.5 µg/m³
38
Canyon Creek OEC (1211)
20.9 km PM2.5: 9.2 µg/m³
51
Porter Ranch Cmty Sch (2303)
22.1 km PM2.5: 12.1 µg/m³
52
Castlebay Ln ES (2881)
22.8 km PM2.5: 12.4 µg/m³
51
Van Gogh ES (7422)
23.1 km PM2.5: 12.1 µg/m³

What cities are near Castaic?

50 Valencia 49 Stevenson Ranch 50 Santa Clarita 51 Canyon Country 47 Sylmar 41 Chatsworth 44 Simi Valley 52 San Fernando 44 Fillmore 47 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 2026-06-09T00:39 UTC.