Stay updated with real-time air quality in Sierra Madre, 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)
22
Good
Sierra Madre, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.14 μg/m³
0
55
155
255
425
605+
21.86 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
22.35 ppb
0
54
101
361
1250
2050+
0.36 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Sierra Madre, California
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AQI 23
Good
4.49μg/m³
PM2.5
19.45μg/m³
PM10
25.02ppb
O3
0.29ppb
SO2
20.67ppb
NO2
0.29ppm
CO
AQI 31
Good
4.81μg/m³
PM2.5
17.14μg/m³
PM10
33.63ppb
O3
0.30ppb
SO2
16.48ppb
NO2
0.32ppm
CO
AQI 24
Good
3.63μg/m³
PM2.5
14.80μg/m³
PM10
25.73ppb
O3
0.28ppb
SO2
17.66ppb
NO2
0.29ppm
CO
AQI 27
Good
5.35μg/m³
PM2.5
23.02μg/m³
PM10
21.56ppb
O3
0.28ppb
SO2
22.91ppb
NO2
0.30ppm
CO
AQI 26
Good
2.58μg/m³
PM2.5
9.74μg/m³
PM10
28.09ppb
O3
0.28ppb
SO2
14.69ppb
NO2
0.28ppm
CO
AQI 31
Good
4.81μg/m³
PM2.5
17.14μg/m³
PM10
33.63ppb
O3
0.30ppb
SO2
16.48ppb
NO2
0.32ppm
CO
Air quality data and pollutant measurements for California, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Sierra Madre, California is updated every hour.
The worst air quality in Sierra Madre, California in the last 24 hours was observed at 07:00:00 on 2026-03-05.
In the last 24 hrs, the best air quality in Sierra Madre, California was observed at 07:00:00 on 2026-03-06.
The current air quality in Sierra Madre, California is 22, categorized as Good based on real-time data.
The most common pollutant in Sierra Madre, California is PM2.5.
If the air quality in Sierra Madre, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Sierra Madre, California is 3.865 μg/m3.
The current PM10 concentration at Sierra Madre, California is 18.138 μg/m3.
The current carbon monoxide (CO) concentration at Sierra Madre, California is 0.36 ppm.
The current sulfur dioxide (SO2) concentration at Sierra Madre, California is 0.292 ppb.
The current ozone (O3) concentration at Sierra Madre, California is 21.861 ppm.
The current nitrogen dioxide (NO2) concentration at Sierra Madre, California is 22.35 ppb.
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