Stay updated with real-time air quality in Simi Valley, California featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
22
Good
Simi Valley, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.28 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.40 μg/m³
0
55
155
255
425
605+
23.73 ppb
0
55
71
86
201
201+
0.23 ppb
0
36
76
186
605
1005+
3.48 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Simi Valley, California
Simi Valley, California
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AQI 33
Good
5.96μg/m³
PM2.5
26.21μg/m³
PM10
32.21ppb
O3
0.44ppb
SO2
2.65ppb
NO2
0.16ppm
CO
AQI 33
Good
5.56μg/m³
PM2.5
23.36μg/m³
PM10
32.61ppb
O3
0.43ppb
SO2
2.64ppb
NO2
0.16ppm
CO
AQI 33
Good
6.48μg/m³
PM2.5
28.69μg/m³
PM10
31.64ppb
O3
0.44ppb
SO2
2.84ppb
NO2
0.16ppm
CO
AQI 33
Good
5.74μg/m³
PM2.5
24.25μg/m³
PM10
32.77ppb
O3
0.42ppb
SO2
2.79ppb
NO2
0.16ppm
CO
AQI 31
Good
4.01μg/m³
PM2.5
23.22μg/m³
PM10
33.63ppb
O3
0.40ppb
SO2
3.20ppb
NO2
0.17ppm
CO
AQI 33
Good
6.44μg/m³
PM2.5
14.60μg/m³
PM10
32.52ppb
O3
0.45ppb
SO2
2.94ppb
NO2
0.16ppm
CO
Air quality data and pollutant measurements for California, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Simi Valley, California is updated every hour.
The worst air quality in Simi Valley, California in the last 24 hours was observed at 09:00:00 on 2025-07-20.
In the last 24 hrs, the best air quality in Simi Valley, California was observed at 06:00:00 on 2025-07-21.
The current air quality in Simi Valley, California is 29, categorized as Good based on real-time data.
The most common pollutant in Simi Valley, California is O3.
If the air quality in Simi Valley, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Simi Valley, California is 5.116 μg/m3.
The current PM10 concentration at Simi Valley, California is 22.131 μg/m3.
The current carbon monoxide (CO) concentration at Simi Valley, California is 0.137 ppm.
The current sulfur dioxide (SO2) concentration at Simi Valley, California is 0.307 ppb.
The current ozone (O3) concentration at Simi Valley, California is 30.918 ppm.
The current nitrogen dioxide (NO2) concentration at Simi Valley, California is 2.454 ppb.
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