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
11.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
49.68 μg/m³
0
55
155
255
425
605+
53.09 ppb
0
55
71
86
201
201+
0.72 ppb
0
36
76
186
605
1005+
5.61 ppb
0
54
101
361
1250
2050+
0.21 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 58
Moderate
12.79μg/m³
PM2.5
49.44μg/m³
PM10
41.73ppb
O3
0.75ppb
SO2
5.78ppb
NO2
0.17ppm
CO
AQI 58
Moderate
12.61μg/m³
PM2.5
47.77μg/m³
PM10
37.39ppb
O3
0.72ppb
SO2
6.41ppb
NO2
0.19ppm
CO
AQI 58
Moderate
12.72μg/m³
PM2.5
50.02μg/m³
PM10
41.24ppb
O3
0.77ppb
SO2
5.93ppb
NO2
0.15ppm
CO
AQI 58
Moderate
12.62μg/m³
PM2.5
53.24μg/m³
PM10
41.71ppb
O3
0.76ppb
SO2
5.54ppb
NO2
0.16ppm
CO
AQI 58
Moderate
12.90μg/m³
PM2.5
48.06μg/m³
PM10
41.05ppb
O3
0.77ppb
SO2
6.18ppb
NO2
0.15ppm
CO
AQI 58
Moderate
12.61μg/m³
PM2.5
47.77μg/m³
PM10
37.39ppb
O3
0.72ppb
SO2
6.41ppb
NO2
0.19ppm
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 08:00:00 on 2026-06-25.
In the last 24 hrs, the best air quality in Sierra Madre, California was observed at 08:00:00 on 2026-06-26.
The current air quality in Sierra Madre, California is 58, 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 12.62 μg/m3.
The current PM10 concentration at Sierra Madre, California is 50.853 μg/m3.
The current carbon monoxide (CO) concentration at Sierra Madre, California is 0.155 ppm.
The current sulfur dioxide (SO2) concentration at Sierra Madre, California is 0.765 ppb.
The current ozone (O3) concentration at Sierra Madre, California is 41.293 ppm.
The current nitrogen dioxide (NO2) concentration at Sierra Madre, California is 5.822 ppb.
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