Stay updated with real-time air quality in El Cajon, 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)
35
Good
El Cajon, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
5.79 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.01 μg/m³
0
55
155
255
425
605+
37.92 ppb
0
55
71
86
201
201+
0.39 ppb
0
36
76
186
605
1005+
4.57 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
El Cajon, California
El Cajon, California
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AQI 32
Good
5.33μg/m³
PM2.5
13.11μg/m³
PM10
34.96ppb
O3
0.43ppb
SO2
5.42ppb
NO2
0.20ppm
CO
AQI 33
Good
5.37μg/m³
PM2.5
13.99μg/m³
PM10
35.55ppb
O3
0.42ppb
SO2
4.66ppb
NO2
0.21ppm
CO
AQI 32
Good
5.31μg/m³
PM2.5
13.12μg/m³
PM10
35.00ppb
O3
0.42ppb
SO2
5.03ppb
NO2
0.21ppm
CO
AQI 32
Good
5.31μg/m³
PM2.5
13.09μg/m³
PM10
34.90ppb
O3
0.42ppb
SO2
5.06ppb
NO2
0.20ppm
CO
AQI 32
Good
5.35μg/m³
PM2.5
13.18μg/m³
PM10
35.03ppb
O3
0.43ppb
SO2
5.32ppb
NO2
0.20ppm
CO
AQI 33
Good
5.30μg/m³
PM2.5
13.87μg/m³
PM10
35.64ppb
O3
0.42ppb
SO2
4.35ppb
NO2
0.22ppm
CO
The air quality data for California, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for El Cajon, California are available every hour.
El Cajon, California experienced its worst air quality at 12:00:00, 2025-06-06.
The best air quality in El Cajon, California was observed at 03:00:00 on 2025-06-06.
The air quality in El Cajon, California right now is Good, with an AQI of 35.
In El Cajon, California, O3 is the most frequently found pollutant.
When air quality in El Cajon, California is compromised, staying indoors and wearing a mask can reduce health risks.
El Cajon, California currently has a PM2.5 concentration of 5.794 μg/m3.
El Cajon, California currently has a PM10 concentration of 14.012 μg/m3.
The current carbon monoxide (CO) level in El Cajon, California is 0.201 ppm.
The current sulfur dioxide (SO2) concentration in El Cajon, California is 0.385 ppb.
El Cajon, California currently has an ozone (O3) concentration of 37.923 ppm.
The current level of nitrogen dioxide (NO2) in El Cajon, California is 4.573 ppb.
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