Stay updated with real-time air quality in Rancho Santa Margarita, 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)
38
Good
Rancho Santa Margarita, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.18 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.54 μg/m³
0
55
155
255
425
605+
22.67 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
14.21 ppb
0
54
101
361
1250
2050+
0.41 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Rancho Santa Margarita, California
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AQI 38
Good
6.84μg/m³
PM2.5
12.74μg/m³
PM10
22.20ppb
O3
0.56ppb
SO2
11.87ppb
NO2
0.40ppm
CO
AQI 33
Good
5.80μg/m³
PM2.5
6.56μg/m³
PM10
22.94ppb
O3
0.56ppb
SO2
12.47ppb
NO2
0.39ppm
CO
AQI 33
Good
5.76μg/m³
PM2.5
6.27μg/m³
PM10
23.00ppb
O3
0.56ppb
SO2
12.46ppb
NO2
0.39ppm
CO
AQI 33
Good
6.01μg/m³
PM2.5
7.45μg/m³
PM10
22.98ppb
O3
0.56ppb
SO2
12.16ppb
NO2
0.39ppm
CO
AQI 38
Good
6.69μg/m³
PM2.5
11.27μg/m³
PM10
23.21ppb
O3
0.56ppb
SO2
11.46ppb
NO2
0.39ppm
CO
AQI 33
Good
6.20μg/m³
PM2.5
8.22μg/m³
PM10
22.99ppb
O3
0.56ppb
SO2
11.96ppb
NO2
0.39ppm
CO
Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Rancho Santa Margarita, California is updated every hour for accuracy.
In the past 24 hours, the air quality in Rancho Santa Margarita, California was at its worst at 11:00:00 on 2026-03-14.
In the last 24 hours, the best air quality in Rancho Santa Margarita, California was observed at 03:00:00 on 2026-03-14.
As of now, the AQI in Rancho Santa Margarita, California is 38, indicating Good conditions.
Rancho Santa Margarita, California air has the highest levels of PM2.5.
Poor air quality in Rancho Santa Margarita, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Rancho Santa Margarita, California are currently 7.177 μg/m3.
The PM10 concentration in Rancho Santa Margarita, California is 14.539 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Rancho Santa Margarita, California is 0.41 ppm.
Currently, Rancho Santa Margarita, California has a sulfur dioxide (SO2) concentration of 0.579 ppb.
The current ozone (O3) level in Rancho Santa Margarita, California at the moment is 22.668 ppm.
Nitrogen dioxide (NO2) level in Rancho Santa Margarita, California at the moment is 14.208 ppb.
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