Air Quality in Castaic, United States

Windy
20.7°C · 45.7% humidity
20.7°
Feels 20.7°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
7 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
14 1pm
14
14
20 4pm
16
15
16 7pm
16
15
15 10pm
15
21
21 1am
21
21
21 4am
21
41
21 7am
21
21
21 10am
21
21
Station readings
12
12
12
17
CAMS model adj -13
27
27
27
27
25
25
27
27
27
27
27
34
34
34
34
34
34
54
34
34
34
34
34
34
AD 728×90

Air Quality Index Trend

40h · 1 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.

45.7%
Humidity
92.0 km/h
Wind SW
1011.1 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
20
4.76 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.5 Trend

40h · 1 station
PM2.54.76 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX12.9
Extreme
AD 300×250
Station readings (7 stations within 25 km)
4.76
Median
4.68
Average
3.71
Low
7.4
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +2.6

What is the 7-day forecast for Castaic?

05-29
32.6° 14.3°
05-30
20.7° 10.9°
05-31
29.9° 17.2°
06-01
32.6° 12.9°
06-02
29.7° 10.9°
06-03
31.0° 8.1°
06-04
25.8° 12.5°
Both models agree Avg diff: 4.7°C

Where are air quality stations near Castaic?

18
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 4.3 µg/m³
25
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 6.0 µg/m³
34
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 8.2 µg/m³
46
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 11.0 µg/m³
5
Santa Clarita-Placerita, Los Angeles
14.6 km PM2.5: 1.2 µg/m³
42
Piru - Pacific, Ventura, California
19.6 km PM2.5: 10.1 µg/m³
17
Canyon Creek OEC (1211)
20.9 km PM2.5: 4.0 µg/m³
16
Porter Ranch Cmty Sch (2303)
22.1 km PM2.5: 3.8 µg/m³
15
Castlebay Ln ES (2881)
22.8 km PM2.5: 3.7 µg/m³
16
Van Gogh ES (7422)
23.1 km PM2.5: 3.9 µg/m³

What cities are near Castaic?

18 Valencia 19 Stevenson Ranch 21 Santa Clarita 18 Canyon Country 20 Sylmar 16 Chatsworth 19 Simi Valley 17 San Fernando 29 Fillmore 17 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 2026-05-29T23:35 UTC.