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)
39
Good
Lake Forest, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.37 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.45 μg/m³
0
55
155
255
425
605+
41.56 ppb
0
55
71
86
201
201+
0.31 ppb
0
36
76
186
605
1005+
2.77 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Lake Forest, California
Lake Forest, California
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AQI 36
Good
4.37μg/m³
PM2.5
16.83μg/m³
PM10
39.45ppb
O3
0.31ppb
SO2
2.75ppb
NO2
0.19ppm
CO
AQI 38
Good
4.38μg/m³
PM2.5
16.09μg/m³
PM10
41.03ppb
O3
0.31ppb
SO2
2.67ppb
NO2
0.18ppm
CO
AQI 36
Good
4.37μg/m³
PM2.5
16.83μg/m³
PM10
39.45ppb
O3
0.31ppb
SO2
2.75ppb
NO2
0.19ppm
CO
AQI 42
Good
4.32μg/m³
PM2.5
16.45μg/m³
PM10
44.59ppb
O3
0.31ppb
SO2
2.73ppb
NO2
0.16ppm
CO
AQI 35
Good
4.39μg/m³
PM2.5
16.73μg/m³
PM10
38.30ppb
O3
0.32ppb
SO2
2.69ppb
NO2
0.19ppm
CO
AQI 42
Good
4.35μg/m³
PM2.5
16.45μg/m³
PM10
44.63ppb
O3
0.31ppb
SO2
2.60ppb
NO2
0.16ppm
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 2025-09-10.
In the last 24 hrs, the best air quality in Lake Forest, California was observed at 01:00:00 on 2025-09-10.
The current air quality in Lake Forest, California is 39, categorized as Good based on real-time data.
The most common pollutant in Lake Forest, California is O3.
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 4.368 μg/m3.
The current PM10 concentration at Lake Forest, California is 16.445 μg/m3.
The current carbon monoxide (CO) concentration at Lake Forest, California is 0.187 ppm.
The current sulfur dioxide (SO2) concentration at Lake Forest, California is 0.308 ppb.
The current ozone (O3) concentration at Lake Forest, California is 41.564 ppm.
The current nitrogen dioxide (NO2) concentration at Lake Forest, California is 2.766 ppb.
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