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)
56
Moderate
Sierra Madre, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.93 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
50.33 μg/m³
0
55
155
255
425
605+
32.27 ppb
0
55
71
86
201
201+
0.72 ppb
0
36
76
186
605
1005+
9.92 ppb
0
54
101
361
1250
2050+
0.34 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Sierra Madre, California
Sierra Madre, California
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AQI 54
Moderate
11.13μg/m³
PM2.5
38.36μg/m³
PM10
37.44ppb
O3
0.80ppb
SO2
10.15ppb
NO2
0.35ppm
CO
AQI 54
Moderate
11.24μg/m³
PM2.5
46.03μg/m³
PM10
32.43ppb
O3
0.82ppb
SO2
7.84ppb
NO2
0.38ppm
CO
AQI 54
Moderate
11.04μg/m³
PM2.5
34.36μg/m³
PM10
38.53ppb
O3
0.80ppb
SO2
8.46ppb
NO2
0.34ppm
CO
AQI 54
Moderate
11.36μg/m³
PM2.5
42.62μg/m³
PM10
35.49ppb
O3
0.80ppb
SO2
10.99ppb
NO2
0.35ppm
CO
AQI 54
Moderate
10.82μg/m³
PM2.5
28.22μg/m³
PM10
40.78ppb
O3
0.80ppb
SO2
6.87ppb
NO2
0.34ppm
CO
AQI 54
Moderate
11.24μg/m³
PM2.5
46.03μg/m³
PM10
32.43ppb
O3
0.82ppb
SO2
7.84ppb
NO2
0.38ppm
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 09:00:00 on 2026-08-23.
In the last 24 hrs, the best air quality in Sierra Madre, California was observed at 04:00:00 on 2026-08-24.
The current air quality in Sierra Madre, California is 56, categorized as Moderate 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 11.929 μg/m3.
The current PM10 concentration at Sierra Madre, California is 50.326 μg/m3.
The current carbon monoxide (CO) concentration at Sierra Madre, California is 0.345 ppm.
The current sulfur dioxide (SO2) concentration at Sierra Madre, California is 0.723 ppb.
The current ozone (O3) concentration at Sierra Madre, California is 32.275 ppm.
The current nitrogen dioxide (NO2) concentration at Sierra Madre, California is 9.918 ppb.
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