Stay updated with real-time air quality in South Pasadena, 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)
44
Good
South Pasadena, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.77 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.65 μg/m³
0
55
155
255
425
605+
47.67 ppb
0
55
71
86
201
201+
0.35 ppb
0
36
76
186
605
1005+
3.77 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
South Pasadena, California
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AQI 43
Good
5.81μg/m³
PM2.5
23.29μg/m³
PM10
46.46ppb
O3
0.35ppb
SO2
4.22ppb
NO2
0.18ppm
CO
AQI 44
Good
5.75μg/m³
PM2.5
22.37μg/m³
PM10
48.38ppb
O3
0.35ppb
SO2
3.58ppb
NO2
0.18ppm
CO
AQI 44
Good
5.77μg/m³
PM2.5
22.58μg/m³
PM10
48.06ppb
O3
0.36ppb
SO2
3.71ppb
NO2
0.18ppm
CO
AQI 43
Good
5.84μg/m³
PM2.5
23.73μg/m³
PM10
45.77ppb
O3
0.36ppb
SO2
4.53ppb
NO2
0.18ppm
CO
AQI 40
Good
5.93μg/m³
PM2.5
25.30μg/m³
PM10
42.67ppb
O3
0.36ppb
SO2
5.63ppb
NO2
0.18ppm
CO
AQI 43
Good
5.87μg/m³
PM2.5
24.07μg/m³
PM10
46.15ppb
O3
0.36ppb
SO2
4.48ppb
NO2
0.19ppm
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 South Pasadena, California is updated on an hourly basis.
The worst air quality in South Pasadena, California was recorded at 05:00:00 on 2026-03-09.
The best air quality in South Pasadena, California was recorded at 01:00:00 on 2026-03-09.
The real-time air quality index in South Pasadena, California is 44, currently categorized as Good.
The most common pollutant in South Pasadena, California is O3.
If the air quality in South Pasadena, California is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in South Pasadena, California at present are 5.767 μg/m3.
The current PM10 levels in South Pasadena, California are 22.647 μg/m3.
The current carbon monoxide (CO) level in South Pasadena, California is 0.174 ppm.
The current sulfur dioxide (SO2) levels in South Pasadena, California are 0.349 ppb.
The current ozone (O3) levels at South Pasadena, California is 47.667 ppm.
The current nitrogen dioxide (NO2) levels at South Pasadena, California is 3.774 ppb.
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