Stay updated with real-time air quality in San Jose, 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)
67
Moderate
San Jose, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
17.97 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
79.93 μg/m³
0
55
155
255
425
605+
16.00 ppb
0
55
71
86
201
201+
0.59 ppb
0
36
76
186
605
1005+
19.08 ppb
0
54
101
361
1250
2050+
0.53 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
San Jose, California
San Jose, California
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AQI 60
Moderate
14.44μg/m³
PM2.5
65.49μg/m³
PM10
17.06ppb
O3
0.87ppb
SO2
12.64ppb
NO2
0.42ppm
CO
AQI 64
Moderate
15.67μg/m³
PM2.5
70.43μg/m³
PM10
17.05ppb
O3
0.87ppb
SO2
13.04ppb
NO2
0.47ppm
CO
AQI 60
Moderate
13.90μg/m³
PM2.5
62.79μg/m³
PM10
17.11ppb
O3
0.87ppb
SO2
12.44ppb
NO2
0.43ppm
CO
AQI 62
Moderate
14.52μg/m³
PM2.5
65.78μg/m³
PM10
17.24ppb
O3
0.85ppb
SO2
12.63ppb
NO2
0.43ppm
CO
AQI 58
Moderate
12.55μg/m³
PM2.5
43.56μg/m³
PM10
15.18ppb
O3
0.90ppb
SO2
11.01ppb
NO2
0.43ppm
CO
AQI 56
Moderate
12.48μg/m³
PM2.5
43.58μg/m³
PM10
15.97ppb
O3
0.89ppb
SO2
10.42ppb
NO2
0.43ppm
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 Jose, California is updated every hour for accuracy.
In the past 24 hours, the air quality in San Jose, California was at its worst at 12:00:00 on 2026-01-24.
In the last 24 hours, the best air quality in San Jose, California was observed at 03:00:00 on 2026-01-23.
As of now, the AQI in San Jose, California is 62, indicating Moderate conditions.
San Jose, California air has the highest levels of PM2.5.
Poor air quality in San Jose, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in San Jose, California are currently 14.785 μg/m3.
The PM10 concentration in San Jose, California is 66.934 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in San Jose, California is 0.426 ppm.
Currently, San Jose, California has a sulfur dioxide (SO2) concentration of 0.874 ppb.
The current ozone (O3) level in San Jose, California at the moment is 17.004 ppm.
Nitrogen dioxide (NO2) level in San Jose, California at the moment is 13.027 ppb.
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