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)
49
Good
Downey, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.97 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.25 μg/m³
0
55
155
255
425
605+
33.80 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
4.44 ppb
0
54
101
361
1250
2050+
0.11 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Downey, California
Downey, California
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AQI 54
Moderate
10.65μg/m³
PM2.5
44.14μg/m³
PM10
29.06ppb
O3
0.52ppb
SO2
7.67ppb
NO2
0.17ppm
CO
AQI 54
Moderate
11.20μg/m³
PM2.5
49.86μg/m³
PM10
32.22ppb
O3
0.49ppb
SO2
5.42ppb
NO2
0.16ppm
CO
AQI 52
Moderate
9.97μg/m³
PM2.5
42.59μg/m³
PM10
26.21ppb
O3
0.49ppb
SO2
9.39ppb
NO2
0.19ppm
CO
AQI 56
Moderate
11.52μg/m³
PM2.5
50.55μg/m³
PM10
33.36ppb
O3
0.50ppb
SO2
4.93ppb
NO2
0.15ppm
CO
AQI 52
Moderate
9.88μg/m³
PM2.5
42.22μg/m³
PM10
26.76ppb
O3
0.45ppb
SO2
9.19ppb
NO2
0.20ppm
CO
AQI 52
Moderate
10.33μg/m³
PM2.5
39.38μg/m³
PM10
36.94ppb
O3
0.44ppb
SO2
7.99ppb
NO2
0.16ppm
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 01:00:00 on 2026-06-08.
In the last 24 hours, the best air quality in Downey, California was observed at 04:00:00 on 2026-06-08.
As of now, the AQI in Downey, California is 49, indicating Good 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 8.967 μg/m3.
The PM10 concentration in Downey, California is 38.252 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Downey, California is 0.112 ppm.
Currently, Downey, California has a sulfur dioxide (SO2) concentration of 0.451 ppb.
The current ozone (O3) level in Downey, California at the moment is 33.803 ppm.
Nitrogen dioxide (NO2) level in Downey, California at the moment is 4.44 ppb.
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