Stay updated with real-time air quality in San Diego, 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)
56
Moderate
San Diego, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
11.77 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
28.88 μg/m³
0
55
155
255
425
605+
36.17 ppb
0
55
71
86
201
201+
0.39 ppb
0
36
76
186
605
1005+
1.66 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
San Diego, California
San Diego, California
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AQI 60
Moderate
13.81μg/m³
PM2.5
37.04μg/m³
PM10
33.58ppb
O3
0.31ppb
SO2
12.93ppb
NO2
0.22ppm
CO
AQI 60
Moderate
14.06μg/m³
PM2.5
39.60μg/m³
PM10
33.43ppb
O3
0.31ppb
SO2
12.41ppb
NO2
0.21ppm
CO
AQI 62
Moderate
15.02μg/m³
PM2.5
49.67μg/m³
PM10
33.48ppb
O3
0.31ppb
SO2
10.57ppb
NO2
0.21ppm
CO
AQI 60
Moderate
13.85μg/m³
PM2.5
38.47μg/m³
PM10
31.55ppb
O3
0.31ppb
SO2
12.07ppb
NO2
0.19ppm
CO
AQI 60
Moderate
14.29μg/m³
PM2.5
38.99μg/m³
PM10
35.01ppb
O3
0.31ppb
SO2
7.97ppb
NO2
0.22ppm
CO
AQI 60
Moderate
13.60μg/m³
PM2.5
36.89μg/m³
PM10
31.02ppb
O3
0.31ppb
SO2
12.23ppb
NO2
0.19ppm
CO
Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for San Diego, California is updated every hour for accuracy.
In the past 24 hours, the air quality in San Diego, California was at its worst at 05:00:00 on 2025-06-18.
In the last 24 hours, the best air quality in San Diego, California was observed at 05:00:00 on 2025-06-19.
As of now, the AQI in San Diego, California is 60, indicating Moderate conditions.
San Diego, California air has the highest levels of PM2.5.
Poor air quality in San Diego, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in San Diego, California are currently 13.635 μg/m3.
The PM10 concentration in San Diego, California is 35.314 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in San Diego, California is 0.218 ppm.
Currently, San Diego, California has a sulfur dioxide (SO2) concentration of 0.309 ppb.
The current ozone (O3) level in San Diego, California at the moment is 33.878 ppm.
Nitrogen dioxide (NO2) level in San Diego, California at the moment is 13.359 ppb.
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