Stay updated with real-time air quality in Monrovia, 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)
54
Moderate
Monrovia, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
11.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
41.14 μg/m³
0
55
155
255
425
605+
31.07 ppb
0
55
71
86
201
201+
0.46 ppb
0
36
76
186
605
1005+
8.19 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Monrovia, California
Monrovia, California
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AQI 54
Moderate
11.21μg/m³
PM2.5
41.14μg/m³
PM10
31.07ppb
O3
0.46ppb
SO2
8.19ppb
NO2
0.20ppm
CO
AQI 58
Moderate
12.57μg/m³
PM2.5
54.60μg/m³
PM10
30.04ppb
O3
0.41ppb
SO2
9.50ppb
NO2
0.20ppm
CO
AQI 56
Moderate
11.85μg/m³
PM2.5
51.55μg/m³
PM10
30.28ppb
O3
0.40ppb
SO2
9.85ppb
NO2
0.20ppm
CO
AQI 58
Moderate
13.05μg/m³
PM2.5
56.56μg/m³
PM10
29.70ppb
O3
0.43ppb
SO2
8.91ppb
NO2
0.20ppm
CO
AQI 58
Moderate
12.77μg/m³
PM2.5
36.90μg/m³
PM10
30.53ppb
O3
0.53ppb
SO2
11.97ppb
NO2
0.20ppm
CO
AQI 58
Moderate
12.85μg/m³
PM2.5
54.76μg/m³
PM10
28.77ppb
O3
0.41ppb
SO2
9.05ppb
NO2
0.20ppm
CO
Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Monrovia, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Monrovia, California was at its worst at 10:00:00 on 2025-06-06.
In the last 24 hours, the best air quality in Monrovia, California was observed at 10:00:00 on 2025-06-07.
As of now, the AQI in Monrovia, California is 54, indicating Moderate conditions.
Monrovia, California air has the highest levels of PM2.5.
Poor air quality in Monrovia, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Monrovia, California are currently 11.21 μg/m3.
The PM10 concentration in Monrovia, California is 41.141 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monrovia, California is 0.198 ppm.
Currently, Monrovia, California has a sulfur dioxide (SO2) concentration of 0.455 ppb.
The current ozone (O3) level in Monrovia, California at the moment is 31.073 ppm.
Nitrogen dioxide (NO2) level in Monrovia, California at the moment is 8.187 ppb.
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