Stay updated with real-time air quality in Daly City, 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)
25
Good
Daly City, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.35 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.65 μg/m³
0
55
155
255
425
605+
26.67 ppb
0
55
71
86
201
201+
0.28 ppb
0
36
76
186
605
1005+
3.52 ppb
0
54
101
361
1250
2050+
0.34 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Daly City, California
Daly City, California
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AQI 43
Good
3.84μg/m³
PM2.5
20.96μg/m³
PM10
45.95ppb
O3
0.43ppb
SO2
5.08ppb
NO2
0.36ppm
CO
AQI 37
Good
3.27μg/m³
PM2.5
15.12μg/m³
PM10
39.62ppb
O3
0.42ppb
SO2
4.93ppb
NO2
0.36ppm
CO
AQI 37
Good
3.27μg/m³
PM2.5
15.12μg/m³
PM10
39.62ppb
O3
0.42ppb
SO2
4.93ppb
NO2
0.36ppm
CO
AQI 22
Good
2.89μg/m³
PM2.5
12.41μg/m³
PM10
23.60ppb
O3
0.33ppb
SO2
2.60ppb
NO2
0.31ppm
CO
AQI 40
Good
3.44μg/m³
PM2.5
18.07μg/m³
PM10
42.51ppb
O3
0.44ppb
SO2
4.87ppb
NO2
0.35ppm
CO
AQI 44
Good
3.55μg/m³
PM2.5
21.11μg/m³
PM10
47.60ppb
O3
0.45ppb
SO2
4.99ppb
NO2
0.34ppm
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 Daly City, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Daly City, California was at its worst at 06:00:00 on 2026-06-12.
In the last 24 hours, the best air quality in Daly City, California was observed at 06:00:00 on 2026-06-12.
As of now, the AQI in Daly City, California is 25, indicating Good conditions.
Daly City, California air has the highest levels of O3.
Poor air quality in Daly City, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Daly City, California are currently 3.352 μg/m3.
The PM10 concentration in Daly City, California is 14.646 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Daly City, California is 0.345 ppm.
Currently, Daly City, California has a sulfur dioxide (SO2) concentration of 0.281 ppb.
The current ozone (O3) level in Daly City, California at the moment is 26.673 ppm.
Nitrogen dioxide (NO2) level in Daly City, California at the moment is 3.518 ppb.
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