Stay updated with real-time air quality in San Lorenzo, 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)
49
Good
San Lorenzo, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
37.06 μg/m³
0
55
155
255
425
605+
41.12 ppb
0
55
71
86
201
201+
0.75 ppb
0
36
76
186
605
1005+
2.35 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
San Lorenzo, California
San Lorenzo, California
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AQI 49
Good
8.95μg/m³
PM2.5
40.29μg/m³
PM10
40.84ppb
O3
0.71ppb
SO2
2.25ppb
NO2
0.29ppm
CO
AQI 52
Moderate
9.76μg/m³
PM2.5
43.40μg/m³
PM10
41.43ppb
O3
0.67ppb
SO2
2.26ppb
NO2
0.30ppm
CO
AQI 49
Good
8.83μg/m³
PM2.5
39.86μg/m³
PM10
40.85ppb
O3
0.71ppb
SO2
2.22ppb
NO2
0.28ppm
CO
AQI 49
Good
9.10μg/m³
PM2.5
40.84μg/m³
PM10
41.09ppb
O3
0.67ppb
SO2
2.31ppb
NO2
0.29ppm
CO
AQI 52
Moderate
10.24μg/m³
PM2.5
45.34μg/m³
PM10
41.76ppb
O3
0.72ppb
SO2
2.00ppb
NO2
0.30ppm
CO
AQI 49
Good
8.83μg/m³
PM2.5
39.86μg/m³
PM10
40.85ppb
O3
0.71ppb
SO2
2.22ppb
NO2
0.28ppm
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 Lorenzo, California is updated every hour for accuracy.
In the past 24 hours, the air quality in San Lorenzo, California was at its worst at 12:00:00 on 2026-04-25.
In the last 24 hours, the best air quality in San Lorenzo, California was observed at 11:00:00 on 2026-04-25.
As of now, the AQI in San Lorenzo, California is 49, indicating Good conditions.
San Lorenzo, California air has the highest levels of PM2.5.
Poor air quality in San Lorenzo, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in San Lorenzo, California are currently 8.797 μg/m3.
The PM10 concentration in San Lorenzo, California is 37.064 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in San Lorenzo, California is 0.303 ppm.
Currently, San Lorenzo, California has a sulfur dioxide (SO2) concentration of 0.752 ppb.
The current ozone (O3) level in San Lorenzo, California at the moment is 41.117 ppm.
Nitrogen dioxide (NO2) level in San Lorenzo, California at the moment is 2.345 ppb.
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