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)
64
Moderate
Sierra Madre, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
15.83 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
56.79 μg/m³
0
55
155
255
425
605+
9.18 ppb
0
55
71
86
201
201+
0.35 ppb
0
36
76
186
605
1005+
18.60 ppb
0
54
101
361
1250
2050+
0.60 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 66
Moderate
17.26μg/m³
PM2.5
62.57μg/m³
PM10
8.76ppb
O3
0.37ppb
SO2
19.05ppb
NO2
0.61ppm
CO
AQI 58
Moderate
12.89μg/m³
PM2.5
49.20μg/m³
PM10
16.73ppb
O3
0.32ppb
SO2
21.06ppb
NO2
0.64ppm
CO
AQI 60
Moderate
14.33μg/m³
PM2.5
55.26μg/m³
PM10
8.79ppb
O3
0.32ppb
SO2
18.32ppb
NO2
0.60ppm
CO
AQI 67
Moderate
17.85μg/m³
PM2.5
71.89μg/m³
PM10
7.17ppb
O3
0.38ppb
SO2
19.87ppb
NO2
0.61ppm
CO
AQI 56
Moderate
12.20μg/m³
PM2.5
46.17μg/m³
PM10
9.70ppb
O3
0.29ppb
SO2
17.29ppb
NO2
0.60ppm
CO
AQI 58
Moderate
12.89μg/m³
PM2.5
49.20μg/m³
PM10
16.73ppb
O3
0.32ppb
SO2
21.06ppb
NO2
0.64ppm
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 03:00:00 on 2026-01-22.
In the last 24 hrs, the best air quality in Sierra Madre, California was observed at 08:00:00 on 2026-01-22.
The current air quality in Sierra Madre, California is 64, 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 15.83 μg/m3.
The current PM10 concentration at Sierra Madre, California is 56.794 μg/m3.
The current carbon monoxide (CO) concentration at Sierra Madre, California is 0.604 ppm.
The current sulfur dioxide (SO2) concentration at Sierra Madre, California is 0.347 ppb.
The current ozone (O3) concentration at Sierra Madre, California is 9.178 ppm.
The current nitrogen dioxide (NO2) concentration at Sierra Madre, California is 18.601 ppb.
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