Stay updated with real-time air quality in Brea, 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
Brea, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
11.70 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
33.92 μg/m³
0
55
155
255
425
605+
43.81 ppb
0
55
71
86
201
201+
0.46 ppb
0
36
76
186
605
1005+
6.40 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Brea, California
Brea, California
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AQI 56
Moderate
11.54μg/m³
PM2.5
33.96μg/m³
PM10
46.81ppb
O3
0.46ppb
SO2
5.26ppb
NO2
0.10ppm
CO
AQI 54
Moderate
11.24μg/m³
PM2.5
29.69μg/m³
PM10
39.79ppb
O3
0.45ppb
SO2
6.31ppb
NO2
0.19ppm
CO
AQI 56
Moderate
11.89μg/m³
PM2.5
34.34μg/m³
PM10
41.44ppb
O3
0.45ppb
SO2
7.56ppb
NO2
0.23ppm
CO
AQI 58
Moderate
12.64μg/m³
PM2.5
36.42μg/m³
PM10
46.57ppb
O3
0.45ppb
SO2
6.80ppb
NO2
0.18ppm
CO
AQI 54
Moderate
11.40μg/m³
PM2.5
34.61μg/m³
PM10
45.32ppb
O3
0.46ppb
SO2
5.47ppb
NO2
0.13ppm
CO
AQI 58
Moderate
12.57μg/m³
PM2.5
36.12μg/m³
PM10
43.96ppb
O3
0.45ppb
SO2
8.31ppb
NO2
0.23ppm
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 Brea, California is updated every hour.
The worst air quality in Brea, California in the last 24 hours was observed at 10:00:00 on 2025-06-06.
In the last 24 hrs, the best air quality in Brea, California was observed at 08:00:00 on 2025-06-06.
The current air quality in Brea, California is 56, categorized as Moderate based on real-time data.
The most common pollutant in Brea, California is PM2.5.
If the air quality in Brea, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Brea, California is 11.7 μg/m3.
The current PM10 concentration at Brea, California is 33.916 μg/m3.
The current carbon monoxide (CO) concentration at Brea, California is 0.172 ppm.
The current sulfur dioxide (SO2) concentration at Brea, California is 0.456 ppb.
The current ozone (O3) concentration at Brea, California is 43.815 ppm.
The current nitrogen dioxide (NO2) concentration at Brea, California is 6.397 ppb.
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