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)
27
Good
Downey, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.91 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.15 μg/m³
0
55
155
255
425
605+
10.13 ppb
0
55
71
86
201
201+
0.19 ppb
0
36
76
186
605
1005+
16.66 ppb
0
54
101
361
1250
2050+
0.36 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Downey, California
Downey, California
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AQI 27
Good
5.34μg/m³
PM2.5
23.16μg/m³
PM10
25.33ppb
O3
0.46ppb
SO2
9.23ppb
NO2
0.17ppm
CO
AQI 33
Good
5.55μg/m³
PM2.5
21.94μg/m³
PM10
24.37ppb
O3
0.44ppb
SO2
8.74ppb
NO2
0.14ppm
CO
AQI 24
Good
4.48μg/m³
PM2.5
20.16μg/m³
PM10
26.12ppb
O3
0.46ppb
SO2
7.42ppb
NO2
0.19ppm
CO
AQI 33
Good
5.89μg/m³
PM2.5
22.75μg/m³
PM10
22.97ppb
O3
0.43ppb
SO2
8.71ppb
NO2
0.12ppm
CO
AQI 27
Good
5.22μg/m³
PM2.5
23.25μg/m³
PM10
26.15ppb
O3
0.46ppb
SO2
9.65ppb
NO2
0.19ppm
CO
AQI 27
Good
5.18μg/m³
PM2.5
23.92μg/m³
PM10
28.55ppb
O3
0.43ppb
SO2
10.88ppb
NO2
0.18ppm
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 11:00:00 on 2025-07-23.
In the last 24 hours, the best air quality in Downey, California was observed at 03:00:00 on 2025-07-24.
As of now, the AQI in Downey, California is 27, 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 5.442 μg/m3.
The PM10 concentration in Downey, California is 23.718 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Downey, California is 0.173 ppm.
Currently, Downey, California has a sulfur dioxide (SO2) concentration of 0.456 ppb.
The current ozone (O3) level in Downey, California at the moment is 25.415 ppm.
Nitrogen dioxide (NO2) level in Downey, California at the moment is 9.735 ppb.
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