Air Quality in Brea, United States

Clear
30.0°C · 37.3% humidity
30.0°
Feels 30.0°
58
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Calibrated model

Nearby Monitoring Stations

AQI Forecast Calibrated
26 7pm
26
26
58 10pm
37
30
26 1am
22
20
18 4am
29
28
28 7am
15
27
27 10am
26
26
26 1pm
26
26
26 4pm
26
26
Station readings
21
21
17
CAMS model adj -40
66
66
66
66
54
54
54
54
54
54
66
66
66
54
66
66
66
66
66
66
66
66
66
66
AD 728×90

Air Quality Index Trend

47h · 1 stn

Brea's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Brea is 1.0× the WHO 24-hour guideline of 15 µg/m³.

37.3%
Humidity
33.9 km/h
Wind SW
1010.1 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
58
15.27 µg/m³
PM10▲
60
73.05 µg/m³
050100150200300500

What is the weather forecast for Brea?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.515.27 µg/m³ ✓ WHO
Moderate
PM1073.05 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for Brea?

08-03
34.0° 23.6°
08-04
32.4° 24.7°
08-05
35.9° 23.7°
08-06
34.3° 20.7°
08-07
29.7° 24.1°
08-08
32.9° 21.1°
08-09
30.9° 20.1°
Both models agree Avg diff: 2.7°C

Where are air quality stations near Brea?

46
Garfield HS/Monterey CHS (8677)
26.9 km PM2.5: 11.0 µg/m³
17
united-states-of-america-san-marino-sierra-madre-boulevard
30.6 km 31.4°C 30.0% RH PM2.5: 4.0 µg/m³ PM10: 4.0 µg/m³
37
Sierra Park ES (6753)
30.9 km PM2.5: 8.8 µg/m³
40
Sierra Vista ES (6767)
31.1 km PM2.5: 9.6 µg/m³

What cities are near Brea?

75 La Habra 46 Placentia 55 Fullerton 75 Rowland Heights 51 Yorba Linda 55 Anaheim 75 La Mirada 74 Buena Park 42 Hacienda Heights 42 South San Jose Hills
Get AQI alerts for Brea

Notify me when air quality reaches:

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T05:34 UTC.