Stay updated with real-time air quality in Lake Forest, 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)
66
Moderate
Lake Forest, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.99 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.21 μg/m³
0
55
155
255
425
605+
19.96 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
24.65 ppb
0
54
101
361
1250
2050+
0.48 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Lake Forest, California
Lake Forest, California
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AQI 66
Moderate
17.43μg/m³
PM2.5
26.13μg/m³
PM10
22.26ppb
O3
0.33ppb
SO2
26.20ppb
NO2
0.53ppm
CO
AQI 67
Moderate
17.94μg/m³
PM2.5
25.22μg/m³
PM10
22.87ppb
O3
0.33ppb
SO2
26.45ppb
NO2
0.53ppm
CO
AQI 67
Moderate
17.63μg/m³
PM2.5
25.73μg/m³
PM10
22.53ppb
O3
0.33ppb
SO2
26.29ppb
NO2
0.53ppm
CO
AQI 71
Moderate
19.72μg/m³
PM2.5
28.72μg/m³
PM10
21.08ppb
O3
0.33ppb
SO2
26.09ppb
NO2
0.54ppm
CO
AQI 66
Moderate
17.34μg/m³
PM2.5
26.50μg/m³
PM10
22.03ppb
O3
0.33ppb
SO2
26.07ppb
NO2
0.53ppm
CO
AQI 69
Moderate
18.66μg/m³
PM2.5
27.68μg/m³
PM10
21.55ppb
O3
0.33ppb
SO2
25.77ppb
NO2
0.53ppm
CO
Air quality data and pollutant measurements for California, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Lake Forest, California is updated every hour.
The worst air quality in Lake Forest, California in the last 24 hours was observed at 06:00:00 on 2026-01-22.
In the last 24 hrs, the best air quality in Lake Forest, California was observed at 04:00:00 on 2026-01-22.
The current air quality in Lake Forest, California is 66, categorized as Moderate based on real-time data.
The most common pollutant in Lake Forest, California is PM2.5.
If the air quality in Lake Forest, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Lake Forest, California is 16.993 μg/m3.
The current PM10 concentration at Lake Forest, California is 20.21 μg/m3.
The current carbon monoxide (CO) concentration at Lake Forest, California is 0.484 ppm.
The current sulfur dioxide (SO2) concentration at Lake Forest, California is 0.34 ppb.
The current ozone (O3) concentration at Lake Forest, California is 19.959 ppm.
The current nitrogen dioxide (NO2) concentration at Lake Forest, California is 24.654 ppb.
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