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)
31
Good
Rancho San Diego, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.41 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.49 μg/m³
0
55
155
255
425
605+
34.11 ppb
0
55
71
86
201
201+
0.19 ppb
0
36
76
186
605
1005+
2.25 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Rancho San Diego, California
Rancho San Diego, California
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AQI 31
Good
4.76μg/m³
PM2.5
15.62μg/m³
PM10
33.94ppb
O3
0.22ppb
SO2
3.86ppb
NO2
0.17ppm
CO
AQI 32
Good
4.52μg/m³
PM2.5
14.10μg/m³
PM10
34.97ppb
O3
0.22ppb
SO2
3.01ppb
NO2
0.16ppm
CO
AQI 31
Good
4.79μg/m³
PM2.5
15.73μg/m³
PM10
33.91ppb
O3
0.22ppb
SO2
3.90ppb
NO2
0.17ppm
CO
AQI 31
Good
4.90μg/m³
PM2.5
16.34μg/m³
PM10
33.72ppb
O3
0.22ppb
SO2
4.14ppb
NO2
0.17ppm
CO
AQI 32
Good
4.57μg/m³
PM2.5
14.36μg/m³
PM10
35.06ppb
O3
0.22ppb
SO2
3.03ppb
NO2
0.16ppm
CO
AQI 31
Good
4.78μg/m³
PM2.5
15.84μg/m³
PM10
33.42ppb
O3
0.22ppb
SO2
4.16ppb
NO2
0.17ppm
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 08:00:00 on 2025-09-11.
The best air quality in Rancho San Diego, California was recorded at 04:00:00 on 2025-09-11.
The real-time air quality index in Rancho San Diego, California is 31, currently categorized as Good.
The most common pollutant in Rancho San Diego, California is O3.
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 4.407 μg/m3.
The current PM10 levels in Rancho San Diego, California are 13.495 μg/m3.
The current carbon monoxide (CO) level in Rancho San Diego, California is 0.125 ppm.
The current sulfur dioxide (SO2) levels in Rancho San Diego, California are 0.191 ppb.
The current ozone (O3) levels at Rancho San Diego, California is 34.106 ppm.
The current nitrogen dioxide (NO2) levels at Rancho San Diego, California is 2.255 ppb.
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