Stay updated with real-time air quality in Aliso Viejo, 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)
38
Good
Aliso Viejo, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.44 μg/m³
0
55
155
255
425
605+
40.53 ppb
0
55
71
86
201
201+
0.59 ppb
0
36
76
186
605
1005+
10.13 ppb
0
54
101
361
1250
2050+
0.44 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Very high
Aliso Viejo, California
Aliso Viejo, California
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AQI 37
Good
5.89μg/m³
PM2.5
15.21μg/m³
PM10
40.26ppb
O3
0.58ppb
SO2
10.10ppb
NO2
0.43ppm
CO
AQI 37
Good
5.87μg/m³
PM2.5
15.33μg/m³
PM10
40.40ppb
O3
0.59ppb
SO2
10.18ppb
NO2
0.44ppm
CO
AQI 43
Good
5.56μg/m³
PM2.5
21.47μg/m³
PM10
46.38ppb
O3
0.59ppb
SO2
3.77ppb
NO2
0.42ppm
CO
AQI 41
Good
5.10μg/m³
PM2.5
22.64μg/m³
PM10
43.63ppb
O3
0.58ppb
SO2
4.11ppb
NO2
0.43ppm
CO
AQI 37
Good
5.91μg/m³
PM2.5
15.05μg/m³
PM10
40.09ppb
O3
0.58ppb
SO2
10.06ppb
NO2
0.42ppm
CO
AQI 38
Good
5.86μg/m³
PM2.5
15.62μg/m³
PM10
40.97ppb
O3
0.58ppb
SO2
9.66ppb
NO2
0.44ppm
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 Aliso Viejo, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Aliso Viejo, California was at its worst at 01:00:00 on 2026-04-24.
In the last 24 hours, the best air quality in Aliso Viejo, California was observed at 11:00:00 on 2026-04-23.
As of now, the AQI in Aliso Viejo, California is 38, indicating Good conditions.
Aliso Viejo, California air has the highest levels of O3.
Poor air quality in Aliso Viejo, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Aliso Viejo, California are currently 5.87 μg/m3.
The PM10 concentration in Aliso Viejo, California is 15.435 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Aliso Viejo, California is 0.442 ppm.
Currently, Aliso Viejo, California has a sulfur dioxide (SO2) concentration of 0.588 ppb.
The current ozone (O3) level in Aliso Viejo, California at the moment is 40.532 ppm.
Nitrogen dioxide (NO2) level in Aliso Viejo, California at the moment is 10.134 ppb.
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