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)
40
Good
Aliso Viejo, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.46 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.96 μg/m³
0
55
155
255
425
605+
42.84 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
5.94 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Aliso Viejo, California
Aliso Viejo, California
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AQI 40
Good
1.43μg/m³
PM2.5
8.98μg/m³
PM10
42.92ppb
O3
0.29ppb
SO2
6.07ppb
NO2
0.27ppm
CO
AQI 40
Good
1.43μg/m³
PM2.5
8.99μg/m³
PM10
42.87ppb
O3
0.29ppb
SO2
6.02ppb
NO2
0.28ppm
CO
AQI 35
Good
1.71μg/m³
PM2.5
9.50μg/m³
PM10
37.86ppb
O3
0.29ppb
SO2
6.00ppb
NO2
0.26ppm
CO
AQI 36
Good
1.83μg/m³
PM2.5
12.80μg/m³
PM10
38.68ppb
O3
0.29ppb
SO2
6.44ppb
NO2
0.27ppm
CO
AQI 40
Good
1.41μg/m³
PM2.5
8.98μg/m³
PM10
42.98ppb
O3
0.29ppb
SO2
6.17ppb
NO2
0.27ppm
CO
AQI 40
Good
1.61μg/m³
PM2.5
8.80μg/m³
PM10
42.85ppb
O3
0.29ppb
SO2
5.64ppb
NO2
0.28ppm
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 04:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Aliso Viejo, California was observed at 11:00:00 on 2026-10-22.
As of now, the AQI in Aliso Viejo, California is 40, 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 1.456 μg/m3.
The PM10 concentration in Aliso Viejo, California is 8.962 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Aliso Viejo, California is 0.276 ppm.
Currently, Aliso Viejo, California has a sulfur dioxide (SO2) concentration of 0.293 ppb.
The current ozone (O3) level in Aliso Viejo, California at the moment is 42.837 ppm.
Nitrogen dioxide (NO2) level in Aliso Viejo, California at the moment is 5.937 ppb.
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