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)
71
Moderate
Monrovia, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
15.66 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
64.70 μg/m³
0
55
155
255
425
605+
60.58 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
8.70 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Monrovia, California
Monrovia, California
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AQI 71
Moderate
15.66μg/m³
PM2.5
64.70μg/m³
PM10
60.58ppb
O3
0.90ppb
SO2
8.70ppb
NO2
0.26ppm
CO
AQI 80
Moderate
16.01μg/m³
PM2.5
72.24μg/m³
PM10
64.17ppb
O3
0.92ppb
SO2
9.63ppb
NO2
0.25ppm
CO
AQI 74
Moderate
15.67μg/m³
PM2.5
71.53μg/m³
PM10
62.38ppb
O3
0.94ppb
SO2
9.86ppb
NO2
0.25ppm
CO
AQI 74
Moderate
15.95μg/m³
PM2.5
72.16μg/m³
PM10
62.04ppb
O3
0.92ppb
SO2
9.86ppb
NO2
0.25ppm
CO
AQI 71
Moderate
14.69μg/m³
PM2.5
66.61μg/m³
PM10
60.50ppb
O3
0.88ppb
SO2
7.34ppb
NO2
0.27ppm
CO
AQI 77
Moderate
15.52μg/m³
PM2.5
71.20μg/m³
PM10
63.02ppb
O3
0.95ppb
SO2
9.87ppb
NO2
0.24ppm
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 09:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Monrovia, California was observed at 09:00:00 on 2026-07-23.
As of now, the AQI in Monrovia, California is 71, indicating Moderate conditions.
Monrovia, California air has the highest levels of O3.
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 15.66 μg/m3.
The PM10 concentration in Monrovia, California is 64.703 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monrovia, California is 0.264 ppm.
Currently, Monrovia, California has a sulfur dioxide (SO2) concentration of 0.897 ppb.
The current ozone (O3) level in Monrovia, California at the moment is 60.581 ppm.
Nitrogen dioxide (NO2) level in Monrovia, California at the moment is 8.7 ppb.
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