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
8.94 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.49 μg/m³
0
55
155
255
425
605+
23.65 ppb
0
55
71
86
201
201+
0.17 ppb
0
36
76
186
605
1005+
7.48 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Downey, California
Downey, California
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AQI 33
Good
6.38μg/m³
PM2.5
26.70μg/m³
PM10
23.41ppb
O3
0.26ppb
SO2
6.00ppb
NO2
0.13ppm
CO
AQI 33
Good
6.10μg/m³
PM2.5
19.83μg/m³
PM10
15.85ppb
O3
0.33ppb
SO2
8.44ppb
NO2
0.13ppm
CO
AQI 38
Good
6.62μg/m³
PM2.5
28.39μg/m³
PM10
23.81ppb
O3
0.26ppb
SO2
5.65ppb
NO2
0.11ppm
CO
AQI 33
Good
6.25μg/m³
PM2.5
17.79μg/m³
PM10
16.90ppb
O3
0.32ppb
SO2
12.81ppb
NO2
0.14ppm
CO
AQI 38
Good
6.53μg/m³
PM2.5
28.67μg/m³
PM10
23.85ppb
O3
0.26ppb
SO2
5.53ppb
NO2
0.11ppm
CO
AQI 33
Good
5.84μg/m³
PM2.5
22.77μg/m³
PM10
20.43ppb
O3
0.32ppb
SO2
12.26ppb
NO2
0.13ppm
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 04:00:00 on 2025-07-13.
In the last 24 hours, the best air quality in Downey, California was observed at 09:00:00 on 2025-07-14.
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 8.79 μg/m3.
The PM10 concentration in Downey, California is 31.462 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Downey, California is 0.117 ppm.
Currently, Downey, California has a sulfur dioxide (SO2) concentration of 0.161 ppb.
The current ozone (O3) level in Downey, California at the moment is 21.996 ppm.
Nitrogen dioxide (NO2) level in Downey, California at the moment is 6.797 ppb.
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