Stay updated with real-time air quality in San Clemente, 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)
64
Moderate
San Clemente, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
15.73 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
68.42 μg/m³
0
55
155
255
425
605+
14.06 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
16.57 ppb
0
54
101
361
1250
2050+
0.68 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
San Clemente, California
San Clemente, California
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AQI 66
Moderate
16.82μg/m³
PM2.5
53.33μg/m³
PM10
14.70ppb
O3
0.51ppb
SO2
22.51ppb
NO2
0.69ppm
CO
AQI 67
Moderate
18.26μg/m³
PM2.5
39.54μg/m³
PM10
14.29ppb
O3
0.51ppb
SO2
21.08ppb
NO2
0.68ppm
CO
AQI 64
Moderate
16.45μg/m³
PM2.5
25.52μg/m³
PM10
12.00ppb
O3
0.49ppb
SO2
17.82ppb
NO2
0.71ppm
CO
AQI 64
Moderate
16.45μg/m³
PM2.5
25.52μg/m³
PM10
12.00ppb
O3
0.49ppb
SO2
17.82ppb
NO2
0.71ppm
CO
AQI 64
Moderate
15.83μg/m³
PM2.5
68.07μg/m³
PM10
14.05ppb
O3
0.50ppb
SO2
25.97ppb
NO2
0.69ppm
CO
AQI 64
Moderate
16.23μg/m³
PM2.5
25.93μg/m³
PM10
11.73ppb
O3
0.49ppb
SO2
17.83ppb
NO2
0.70ppm
CO
Air quality measurements for California, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for San Clemente, California is updated on an hourly basis.
The worst air quality in San Clemente, California was recorded at 08:00:00 on 2026-01-22.
The best air quality in San Clemente, California was recorded at 03:00:00 on 2026-01-23.
The real-time air quality index in San Clemente, California is 64, currently categorized as Moderate.
The most common pollutant in San Clemente, California is PM2.5.
If the air quality in San Clemente, California is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in San Clemente, California at present are 15.727 μg/m3.
The current PM10 levels in San Clemente, California are 68.418 μg/m3.
The current carbon monoxide (CO) level in San Clemente, California is 0.676 ppm.
The current sulfur dioxide (SO2) levels in San Clemente, California are 0.514 ppb.
The current ozone (O3) levels at San Clemente, California is 14.062 ppm.
The current nitrogen dioxide (NO2) levels at San Clemente, California is 16.57 ppb.
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