Stay updated with real-time air quality in San Dimas, 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)
36
Good
San Dimas, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.82 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.28 μg/m³
0
55
155
255
425
605+
38.94 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
6.50 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
San Dimas, California
San Dimas, California
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AQI 37
Good
1.99μg/m³
PM2.5
7.98μg/m³
PM10
40.01ppb
O3
0.33ppb
SO2
8.59ppb
NO2
0.24ppm
CO
AQI 36
Good
4.06μg/m³
PM2.5
8.91μg/m³
PM10
39.01ppb
O3
0.34ppb
SO2
3.96ppb
NO2
0.24ppm
CO
AQI 35
Good
3.93μg/m³
PM2.5
8.11μg/m³
PM10
38.24ppb
O3
0.32ppb
SO2
13.39ppb
NO2
0.25ppm
CO
AQI 36
Good
3.39μg/m³
PM2.5
7.70μg/m³
PM10
39.07ppb
O3
0.34ppb
SO2
3.67ppb
NO2
0.24ppm
CO
AQI 36
Good
3.14μg/m³
PM2.5
7.20μg/m³
PM10
39.10ppb
O3
0.34ppb
SO2
3.58ppb
NO2
0.24ppm
CO
AQI 37
Good
3.04μg/m³
PM2.5
8.56μg/m³
PM10
39.93ppb
O3
0.32ppb
SO2
17.59ppb
NO2
0.24ppm
CO
Air quality data and pollutant measurements for California, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for San Dimas, California is updated every hour.
The worst air quality in San Dimas, California in the last 24 hours was observed at 02:00:00 on 2026-10-22.
In the last 24 hrs, the best air quality in San Dimas, California was observed at 02:00:00 on 2026-10-22.
The current air quality in San Dimas, California is 36, categorized as Good based on real-time data.
The most common pollutant in San Dimas, California is O3.
If the air quality in San Dimas, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at San Dimas, California is 3.823 μg/m3.
The current PM10 concentration at San Dimas, California is 8.284 μg/m3.
The current carbon monoxide (CO) concentration at San Dimas, California is 0.245 ppm.
The current sulfur dioxide (SO2) concentration at San Dimas, California is 0.336 ppb.
The current ozone (O3) concentration at San Dimas, California is 38.937 ppm.
The current nitrogen dioxide (NO2) concentration at San Dimas, California is 6.499 ppb.
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