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)
44
Good
Brea, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
7.53 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.05 μg/m³
0
55
155
255
425
605+
41.32 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
4.03 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Brea, California
Brea, California
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AQI 27
Good
3.39μg/m³
PM2.5
11.05μg/m³
PM10
28.96ppb
O3
0.43ppb
SO2
6.40ppb
NO2
0.19ppm
CO
AQI 27
Good
3.20μg/m³
PM2.5
11.86μg/m³
PM10
28.60ppb
O3
0.42ppb
SO2
8.31ppb
NO2
0.21ppm
CO
AQI 27
Good
3.52μg/m³
PM2.5
13.54μg/m³
PM10
28.71ppb
O3
0.42ppb
SO2
9.36ppb
NO2
0.24ppm
CO
AQI 27
Good
3.61μg/m³
PM2.5
14.15μg/m³
PM10
29.31ppb
O3
0.43ppb
SO2
8.08ppb
NO2
0.21ppm
CO
AQI 26
Good
3.77μg/m³
PM2.5
13.08μg/m³
PM10
27.97ppb
O3
0.43ppb
SO2
7.09ppb
NO2
0.18ppm
CO
AQI 27
Good
3.76μg/m³
PM2.5
14.69μg/m³
PM10
29.22ppb
O3
0.42ppb
SO2
10.23ppb
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 03:00:00 on 2025-07-23.
In the last 24 hrs, the best air quality in Brea, California was observed at 03:00:00 on 2025-07-24.
The current air quality in Brea, California is 24, categorized as Good based on real-time data.
The most common pollutant in Brea, California is O3.
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 4.262 μg/m3.
The current PM10 concentration at Brea, California is 13.894 μg/m3.
The current carbon monoxide (CO) concentration at Brea, California is 0.187 ppm.
The current sulfur dioxide (SO2) concentration at Brea, California is 0.412 ppb.
The current ozone (O3) concentration at Brea, California is 26.034 ppm.
The current nitrogen dioxide (NO2) concentration at Brea, California is 8.704 ppb.
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