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)
36
Good
Sierra Madre, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.98 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.60 μg/m³
0
55
155
255
425
605+
39.27 ppb
0
55
71
86
201
201+
0.39 ppb
0
36
76
186
605
1005+
3.51 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Sierra Madre, California
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AQI 36
Good
3.93μg/m³
PM2.5
16.65μg/m³
PM10
38.77ppb
O3
0.40ppb
SO2
3.91ppb
NO2
0.21ppm
CO
AQI 36
Good
5.17μg/m³
PM2.5
20.25μg/m³
PM10
38.79ppb
O3
0.45ppb
SO2
7.06ppb
NO2
0.25ppm
CO
AQI 37
Good
3.99μg/m³
PM2.5
16.42μg/m³
PM10
39.60ppb
O3
0.39ppb
SO2
3.16ppb
NO2
0.20ppm
CO
AQI 35
Good
3.96μg/m³
PM2.5
16.33μg/m³
PM10
38.12ppb
O3
0.41ppb
SO2
4.28ppb
NO2
0.22ppm
CO
AQI 38
Good
3.96μg/m³
PM2.5
16.55μg/m³
PM10
40.52ppb
O3
0.39ppb
SO2
2.43ppb
NO2
0.19ppm
CO
AQI 36
Good
5.17μg/m³
PM2.5
20.25μg/m³
PM10
38.79ppb
O3
0.45ppb
SO2
7.06ppb
NO2
0.25ppm
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 05:00:00 on 2026-03-09.
In the last 24 hrs, the best air quality in Sierra Madre, California was observed at 01:00:00 on 2026-03-09.
The current air quality in Sierra Madre, California is 36, categorized as Good based on real-time data.
The most common pollutant in Sierra Madre, California is O3.
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 3.976 μg/m3.
The current PM10 concentration at Sierra Madre, California is 16.599 μg/m3.
The current carbon monoxide (CO) concentration at Sierra Madre, California is 0.205 ppm.
The current sulfur dioxide (SO2) concentration at Sierra Madre, California is 0.393 ppb.
The current ozone (O3) concentration at Sierra Madre, California is 39.267 ppm.
The current nitrogen dioxide (NO2) concentration at Sierra Madre, California is 3.509 ppb.
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