Stay updated with real-time air quality in South San Francisco, 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)
38
Good
South San Francisco, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
6.78 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.14 μg/m³
0
55
155
255
425
605+
12.20 ppb
0
55
71
86
201
201+
0.70 ppb
0
36
76
186
605
1005+
3.76 ppb
0
54
101
361
1250
2050+
0.34 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
South San Francisco, California
South San Francisco, California
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AQI 25
Good
2.68μg/m³
PM2.5
19.99μg/m³
PM10
26.51ppb
O3
0.77ppb
SO2
5.77ppb
NO2
0.35ppm
CO
AQI 26
Good
2.90μg/m³
PM2.5
17.24μg/m³
PM10
27.83ppb
O3
0.78ppb
SO2
5.79ppb
NO2
0.35ppm
CO
AQI 27
Good
2.66μg/m³
PM2.5
19.91μg/m³
PM10
28.90ppb
O3
0.77ppb
SO2
4.99ppb
NO2
0.33ppm
CO
AQI 27
Good
2.98μg/m³
PM2.5
20.50μg/m³
PM10
28.82ppb
O3
0.78ppb
SO2
5.79ppb
NO2
0.35ppm
CO
AQI 27
Good
3.37μg/m³
PM2.5
15.64μg/m³
PM10
28.78ppb
O3
0.79ppb
SO2
5.81ppb
NO2
0.35ppm
CO
AQI 26
Good
2.90μg/m³
PM2.5
17.24μg/m³
PM10
27.83ppb
O3
0.78ppb
SO2
5.79ppb
NO2
0.35ppm
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 South San Francisco, California are available every hour.
South San Francisco, California experienced its worst air quality at 04:00:00, 2025-07-10.
The best air quality in South San Francisco, California was observed at 02:00:00 on 2025-07-10.
The air quality in South San Francisco, California right now is Good, with an AQI of 23.
In South San Francisco, California, O3 is the most frequently found pollutant.
When air quality in South San Francisco, California is compromised, staying indoors and wearing a mask can reduce health risks.
South San Francisco, California currently has a PM2.5 concentration of 4.07 μg/m3.
South San Francisco, California currently has a PM10 concentration of 13.173 μg/m3.
The current carbon monoxide (CO) level in South San Francisco, California is 0.332 ppm.
The current sulfur dioxide (SO2) concentration in South San Francisco, California is 0.82 ppb.
South San Francisco, California currently has an ozone (O3) concentration of 25.211 ppm.
The current level of nitrogen dioxide (NO2) in South San Francisco, California is 4.1 ppb.
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