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)
22
Good
San Clemente, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.23 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.39 μg/m³
0
55
155
255
425
605+
23.94 ppb
0
55
71
86
201
201+
0.40 ppb
0
36
76
186
605
1005+
3.01 ppb
0
54
101
361
1250
2050+
0.20 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 44
Good
7.90μg/m³
PM2.5
12.39μg/m³
PM10
17.45ppb
O3
0.16ppb
SO2
11.92ppb
NO2
0.20ppm
CO
AQI 27
Good
5.03μg/m³
PM2.5
20.88μg/m³
PM10
16.54ppb
O3
0.17ppb
SO2
14.52ppb
NO2
0.20ppm
CO
AQI 22
Good
3.76μg/m³
PM2.5
14.34μg/m³
PM10
17.68ppb
O3
0.16ppb
SO2
16.13ppb
NO2
0.20ppm
CO
AQI 22
Good
3.76μg/m³
PM2.5
14.34μg/m³
PM10
17.68ppb
O3
0.16ppb
SO2
16.13ppb
NO2
0.20ppm
CO
AQI 44
Good
7.80μg/m³
PM2.5
13.72μg/m³
PM10
18.44ppb
O3
0.16ppb
SO2
12.99ppb
NO2
0.20ppm
CO
AQI 33
Good
6.25μg/m³
PM2.5
21.54μg/m³
PM10
17.56ppb
O3
0.17ppb
SO2
16.04ppb
NO2
0.20ppm
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 02:00:00 on 2025-07-24.
The best air quality in San Clemente, California was recorded at 03:00:00 on 2025-07-24.
The real-time air quality index in San Clemente, California is 33, currently categorized as Good.
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 5.685 μg/m3.
The current PM10 levels in San Clemente, California are 16.132 μg/m3.
The current carbon monoxide (CO) level in San Clemente, California is 0.185 ppm.
The current sulfur dioxide (SO2) levels in San Clemente, California are 0.236 ppb.
The current ozone (O3) levels at San Clemente, California is 22.165 ppm.
The current nitrogen dioxide (NO2) levels at San Clemente, California is 8.069 ppb.
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