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)
58
Moderate
Brea, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
13.02 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
63.77 μg/m³
0
55
155
255
425
605+
51.71 ppb
0
55
71
86
201
201+
1.04 ppb
0
36
76
186
605
1005+
6.98 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Brea, California
Brea, California
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AQI 65
Moderate
14.60μg/m³
PM2.5
84.19μg/m³
PM10
49.11ppb
O3
0.85ppb
SO2
4.73ppb
NO2
0.31ppm
CO
AQI 61
Moderate
13.26μg/m³
PM2.5
74.88μg/m³
PM10
46.34ppb
O3
0.86ppb
SO2
6.64ppb
NO2
0.36ppm
CO
AQI 62
Moderate
13.75μg/m³
PM2.5
77.04μg/m³
PM10
49.44ppb
O3
0.85ppb
SO2
7.70ppb
NO2
0.35ppm
CO
AQI 62
Moderate
14.32μg/m³
PM2.5
77.65μg/m³
PM10
52.89ppb
O3
0.85ppb
SO2
6.32ppb
NO2
0.32ppm
CO
AQI 63
Moderate
14.80μg/m³
PM2.5
80.30μg/m³
PM10
51.86ppb
O3
0.85ppb
SO2
6.23ppb
NO2
0.31ppm
CO
AQI 62
Moderate
13.75μg/m³
PM2.5
76.75μg/m³
PM10
52.44ppb
O3
0.85ppb
SO2
9.20ppb
NO2
0.35ppm
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 05:00:00 on 2026-07-23.
In the last 24 hrs, the best air quality in Brea, California was observed at 02:00:00 on 2026-07-23.
The current air quality in Brea, California is 58, 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 13.021 μg/m3.
The current PM10 concentration at Brea, California is 63.766 μg/m3.
The current carbon monoxide (CO) concentration at Brea, California is 0.313 ppm.
The current sulfur dioxide (SO2) concentration at Brea, California is 1.036 ppb.
The current ozone (O3) concentration at Brea, California is 51.708 ppm.
The current nitrogen dioxide (NO2) concentration at Brea, California is 6.976 ppb.
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