Stay updated with real-time air quality in San Ramon, 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)
27
Good
San Ramon, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.63 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.54 μg/m³
0
55
155
255
425
605+
24.75 ppb
0
55
71
86
201
201+
0.67 ppb
0
36
76
186
605
1005+
3.38 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
San Ramon, California
San Ramon, California
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AQI 23
Good
3.53μg/m³
PM2.5
25.37μg/m³
PM10
23.68ppb
O3
0.54ppb
SO2
3.39ppb
NO2
0.29ppm
CO
AQI 23
Good
3.94μg/m³
PM2.5
18.25μg/m³
PM10
24.82ppb
O3
0.54ppb
SO2
3.37ppb
NO2
0.26ppm
CO
AQI 20
Good
3.10μg/m³
PM2.5
14.02μg/m³
PM10
21.80ppb
O3
0.70ppb
SO2
5.70ppb
NO2
0.20ppm
CO
AQI 24
Good
3.09μg/m³
PM2.5
13.87μg/m³
PM10
26.16ppb
O3
0.33ppb
SO2
2.08ppb
NO2
0.33ppm
CO
AQI 27
Good
4.88μg/m³
PM2.5
24.09μg/m³
PM10
24.99ppb
O3
0.68ppb
SO2
3.69ppb
NO2
0.21ppm
CO
AQI 27
Good
4.92μg/m³
PM2.5
23.67μg/m³
PM10
25.21ppb
O3
0.67ppb
SO2
3.77ppb
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 San Ramon, California are available every hour.
San Ramon, California experienced its worst air quality at 07:00:00, 2025-06-05.
The best air quality in San Ramon, California was observed at 10:00:00 on 2025-06-06.
The air quality in San Ramon, California right now is Good, with an AQI of 27.
In San Ramon, California, PM2.5 is the most frequently found pollutant.
When air quality in San Ramon, California is compromised, staying indoors and wearing a mask can reduce health risks.
San Ramon, California currently has a PM2.5 concentration of 4.632 μg/m3.
San Ramon, California currently has a PM10 concentration of 20.541 μg/m3.
The current carbon monoxide (CO) level in San Ramon, California is 0.22 ppm.
The current sulfur dioxide (SO2) concentration in San Ramon, California is 0.674 ppb.
San Ramon, California currently has an ozone (O3) concentration of 24.754 ppm.
The current level of nitrogen dioxide (NO2) in San Ramon, California is 3.378 ppb.
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