Stay updated with real-time air quality in Downey, 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)
66
Moderate
Downey, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.59 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
74.11 μg/m³
0
55
155
255
425
605+
54.06 ppb
0
55
71
86
201
201+
0.91 ppb
0
36
76
186
605
1005+
12.31 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Downey, California
Downey, California
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AQI 66
Moderate
16.91μg/m³
PM2.5
75.59μg/m³
PM10
54.91ppb
O3
0.94ppb
SO2
10.24ppb
NO2
0.25ppm
CO
AQI 66
Moderate
16.74μg/m³
PM2.5
76.21μg/m³
PM10
59.30ppb
O3
0.88ppb
SO2
9.67ppb
NO2
0.27ppm
CO
AQI 64
Moderate
15.96μg/m³
PM2.5
70.63μg/m³
PM10
49.32ppb
O3
0.96ppb
SO2
12.18ppb
NO2
0.25ppm
CO
AQI 71
Moderate
16.48μg/m³
PM2.5
73.41μg/m³
PM10
61.22ppb
O3
0.88ppb
SO2
9.96ppb
NO2
0.26ppm
CO
AQI 60
Moderate
14.23μg/m³
PM2.5
63.89μg/m³
PM10
46.09ppb
O3
0.93ppb
SO2
14.28ppb
NO2
0.26ppm
CO
AQI 64
Moderate
15.85μg/m³
PM2.5
70.12μg/m³
PM10
52.16ppb
O3
0.90ppb
SO2
7.35ppb
NO2
0.28ppm
CO
Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Downey, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Downey, California was at its worst at 09:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Downey, California was observed at 04:00:00 on 2026-07-23.
As of now, the AQI in Downey, California is 66, indicating Moderate conditions.
Downey, California air has the highest levels of PM2.5.
Poor air quality in Downey, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Downey, California are currently 16.586 μg/m3.
The PM10 concentration in Downey, California is 74.105 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Downey, California is 0.26 ppm.
Currently, Downey, California has a sulfur dioxide (SO2) concentration of 0.909 ppb.
The current ozone (O3) level in Downey, California at the moment is 54.064 ppm.
Nitrogen dioxide (NO2) level in Downey, California at the moment is 12.314 ppb.
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