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)
66
Moderate
Rancho San Diego, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.76 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
74.93 μg/m³
0
55
155
255
425
605+
33.89 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
3.91 ppb
0
54
101
361
1250
2050+
0.12 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 44
Good
8.26μg/m³
PM2.5
26.20μg/m³
PM10
33.26ppb
O3
0.90ppb
SO2
7.89ppb
NO2
0.27ppm
CO
AQI 44
Good
7.83μg/m³
PM2.5
25.11μg/m³
PM10
35.97ppb
O3
0.89ppb
SO2
6.06ppb
NO2
0.27ppm
CO
AQI 44
Good
8.28μg/m³
PM2.5
26.23μg/m³
PM10
33.14ppb
O3
0.90ppb
SO2
8.01ppb
NO2
0.27ppm
CO
AQI 44
Good
8.42μg/m³
PM2.5
26.42μg/m³
PM10
32.48ppb
O3
0.90ppb
SO2
8.63ppb
NO2
0.27ppm
CO
AQI 44
Good
7.80μg/m³
PM2.5
25.21μg/m³
PM10
37.16ppb
O3
0.89ppb
SO2
6.29ppb
NO2
0.27ppm
CO
AQI 44
Good
8.38μg/m³
PM2.5
26.68μg/m³
PM10
32.41ppb
O3
0.90ppb
SO2
8.15ppb
NO2
0.27ppm
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 03:00:00 on 2026-07-23.
The best air quality in Rancho San Diego, California was recorded at 06:00:00 on 2026-07-23.
The real-time air quality index in Rancho San Diego, California is 66, 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 16.76 μg/m3.
The current PM10 levels in Rancho San Diego, California are 74.929 μg/m3.
The current carbon monoxide (CO) level in Rancho San Diego, California is 0.117 ppm.
The current sulfur dioxide (SO2) levels in Rancho San Diego, California are 0.582 ppb.
The current ozone (O3) levels at Rancho San Diego, California is 33.89 ppm.
The current nitrogen dioxide (NO2) levels at Rancho San Diego, California is 3.912 ppb.
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