Stay updated with real-time air quality in Rancho San Diego, 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)
62
Moderate
Rancho San Diego, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
14.84 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.59 μg/m³
0
55
155
255
425
605+
15.64 ppb
0
55
71
86
201
201+
0.41 ppb
0
36
76
186
605
1005+
27.82 ppb
0
54
101
361
1250
2050+
0.49 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Rancho San Diego, California
Rancho San Diego, California
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AQI 58
Moderate
13.07μg/m³
PM2.5
23.47μg/m³
PM10
25.49ppb
O3
0.42ppb
SO2
14.85ppb
NO2
0.34ppm
CO
AQI 54
Moderate
11.06μg/m³
PM2.5
19.93μg/m³
PM10
22.34ppb
O3
0.43ppb
SO2
14.37ppb
NO2
0.35ppm
CO
AQI 58
Moderate
13.21μg/m³
PM2.5
23.73μg/m³
PM10
25.68ppb
O3
0.42ppb
SO2
14.87ppb
NO2
0.34ppm
CO
AQI 60
Moderate
13.97μg/m³
PM2.5
25.04μg/m³
PM10
26.68ppb
O3
0.42ppb
SO2
14.99ppb
NO2
0.34ppm
CO
AQI 54
Moderate
10.83μg/m³
PM2.5
19.52μg/m³
PM10
22.79ppb
O3
0.43ppb
SO2
14.38ppb
NO2
0.35ppm
CO
AQI 58
Moderate
13.02μg/m³
PM2.5
23.38μg/m³
PM10
26.43ppb
O3
0.42ppb
SO2
15.00ppb
NO2
0.33ppm
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 Rancho San Diego, California is updated on an hourly basis.
The worst air quality in Rancho San Diego, California was recorded at 02:00:00 on 2025-10-27.
The best air quality in Rancho San Diego, California was recorded at 04:00:00 on 2025-10-27.
The real-time air quality index in Rancho San Diego, California is 58, currently categorized as Moderate.
The most common pollutant in Rancho San Diego, California is PM2.5.
If the air quality in Rancho San Diego, California is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Rancho San Diego, California at present are 12.564 μg/m3.
The current PM10 levels in Rancho San Diego, California are 23.116 μg/m3.
The current carbon monoxide (CO) level in Rancho San Diego, California is 0.368 ppm.
The current sulfur dioxide (SO2) levels in Rancho San Diego, California are 0.509 ppb.
The current ozone (O3) levels at Rancho San Diego, California is 22.95 ppm.
The current nitrogen dioxide (NO2) levels at Rancho San Diego, California is 13.84 ppb.
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