Air Quality in Brea, United States

Windy
30.6°C · 22.9% humidity
30.6°
Feels 30.6°
45
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast

Nearby Monitoring Stations

AQI Forecast Calibrated
12 2pm
12
12
45 5pm
24
17
24 8pm
21
18
16 11pm
15
14
14 2am
13
13
13 5am
12
12
12 8am
12
12
12 11am
12
12
Station readings
17
8
4
4
CAMS model adj -42
54
54
54
54
34
34
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

38h · 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 2.2× the WHO annual guideline of 5 µg/m³.

22.9%
Humidity
59.9 km/h
Wind WSW
1011.3 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
45
10.85 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Brea?

Temperature & Precipitation

PM2.5 Trend

38h · 1 station
PM2.510.85 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX5.9
High
AD 300×250

What is the 7-day forecast for Brea?

05-29
30.6° 18.9°
05-30
22.6° 16.8°
05-31
29.0° 19.5°
06-01
31.1° 18.2°
06-02
30.3° 16.2°
06-03
30.4° 16.4°
06-04
26.1° 17.6°
Both models agree Avg diff: 3.4°C

Where are air quality stations near Brea?

12
Davis Elementary
18.0 km PM2.5: 3.0 µg/m³
16
Villa Intermediate
19.8 km PM2.5: 3.8 µg/m³
16
Kennedy Elementary
20.9 km PM2.5: 3.8 µg/m³
17
Century High School
21.3 km PM2.5: 4.1 µg/m³
15
Monroe Elementary
22.8 km PM2.5: 3.7 µg/m³
27
Garfield HS/Monterey CHS (8677)
26.9 km PM2.5: 6.4 µg/m³
4
united-states-of-america-san-marino-sierra-madre-boulevard
30.6 km 25.8°C 33.0% RH PM2.5: 1.0 µg/m³ PM10: 1.0 µg/m³
24
Sierra Park ES (6753)
30.9 km PM2.5: 5.7 µg/m³
24
Sierra Vista ES (6767)
31.1 km PM2.5: 5.7 µg/m³

What cities are near Brea?

45 La Habra 41 Placentia 41 Fullerton 53 Rowland Heights 41 Yorba Linda 41 Anaheim 45 La Mirada 41 Buena Park 30 Hacienda Heights 39 South San Jose Hills
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:11 UTC.