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)
56
Moderate
Lake Forest, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.50 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
30.22 μg/m³
0
55
155
255
425
605+
47.08 ppb
0
55
71
86
201
201+
0.91 ppb
0
36
76
186
605
1005+
8.47 ppb
0
54
101
361
1250
2050+
0.29 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 56
Moderate
11.54μg/m³
PM2.5
31.92μg/m³
PM10
47.63ppb
O3
0.92ppb
SO2
8.38ppb
NO2
0.29ppm
CO
AQI 56
Moderate
11.51μg/m³
PM2.5
30.26μg/m³
PM10
47.20ppb
O3
0.91ppb
SO2
8.46ppb
NO2
0.29ppm
CO
AQI 56
Moderate
11.52μg/m³
PM2.5
31.15μg/m³
PM10
47.45ppb
O3
0.91ppb
SO2
8.40ppb
NO2
0.29ppm
CO
AQI 56
Moderate
11.72μg/m³
PM2.5
33.58μg/m³
PM10
51.70ppb
O3
0.90ppb
SO2
8.59ppb
NO2
0.29ppm
CO
AQI 56
Moderate
11.54μg/m³
PM2.5
32.39μg/m³
PM10
47.92ppb
O3
0.92ppb
SO2
8.30ppb
NO2
0.29ppm
CO
AQI 56
Moderate
11.55μg/m³
PM2.5
32.51μg/m³
PM10
49.65ppb
O3
0.91ppb
SO2
7.97ppb
NO2
0.29ppm
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 10:00:00 on 2026-07-23.
In the last 24 hrs, the best air quality in Lake Forest, California was observed at 03:00:00 on 2026-07-23.
The current air quality in Lake Forest, California is 56, 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 11.504 μg/m3.
The current PM10 concentration at Lake Forest, California is 30.22 μg/m3.
The current carbon monoxide (CO) concentration at Lake Forest, California is 0.288 ppm.
The current sulfur dioxide (SO2) concentration at Lake Forest, California is 0.908 ppb.
The current ozone (O3) concentration at Lake Forest, California is 47.084 ppm.
The current nitrogen dioxide (NO2) concentration at Lake Forest, California is 8.474 ppb.
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