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)
21
Good
Aliso Viejo, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.65 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.44 μg/m³
0
55
155
255
425
605+
23.41 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
7.71 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Aliso Viejo, California
Aliso Viejo, California
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AQI 21
Good
2.47μg/m³
PM2.5
8.18μg/m³
PM10
23.20ppb
O3
0.51ppb
SO2
7.75ppb
NO2
0.30ppm
CO
AQI 21
Good
2.58μg/m³
PM2.5
8.88μg/m³
PM10
23.29ppb
O3
0.51ppb
SO2
7.76ppb
NO2
0.31ppm
CO
AQI 27
Good
4.92μg/m³
PM2.5
20.55μg/m³
PM10
27.15ppb
O3
0.50ppb
SO2
7.74ppb
NO2
0.29ppm
CO
AQI 26
Good
4.11μg/m³
PM2.5
16.90μg/m³
PM10
27.53ppb
O3
0.50ppb
SO2
8.18ppb
NO2
0.30ppm
CO
AQI 21
Good
2.35μg/m³
PM2.5
7.32μg/m³
PM10
23.05ppb
O3
0.51ppb
SO2
7.77ppb
NO2
0.30ppm
CO
AQI 22
Good
2.74μg/m³
PM2.5
10.56μg/m³
PM10
23.82ppb
O3
0.51ppb
SO2
7.62ppb
NO2
0.31ppm
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 09:00:00 on 2026-08-13.
In the last 24 hours, the best air quality in Aliso Viejo, California was observed at 11:00:00 on 2026-08-14.
As of now, the AQI in Aliso Viejo, California is 21, 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 2.655 μg/m3.
The PM10 concentration in Aliso Viejo, California is 9.436 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Aliso Viejo, California is 0.31 ppm.
Currently, Aliso Viejo, California has a sulfur dioxide (SO2) concentration of 0.505 ppb.
The current ozone (O3) level in Aliso Viejo, California at the moment is 23.407 ppm.
Nitrogen dioxide (NO2) level in Aliso Viejo, California at the moment is 7.712 ppb.
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