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)
39
Good
San Dimas, California
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
6.73 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.57 μg/m³
0
55
155
255
425
605+
41.68 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
5.82 ppb
0
54
101
361
1250
2050+
0.20 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 33
Good
5.61μg/m³
PM2.5
23.37μg/m³
PM10
29.49ppb
O3
0.44ppb
SO2
12.52ppb
NO2
0.20ppm
CO
AQI 30
Good
3.66μg/m³
PM2.5
23.94μg/m³
PM10
31.90ppb
O3
0.44ppb
SO2
9.47ppb
NO2
0.20ppm
CO
AQI 33
Good
5.73μg/m³
PM2.5
22.95μg/m³
PM10
29.07ppb
O3
0.44ppb
SO2
11.76ppb
NO2
0.20ppm
CO
AQI 29
Good
3.94μg/m³
PM2.5
23.00μg/m³
PM10
30.76ppb
O3
0.44ppb
SO2
9.28ppb
NO2
0.19ppm
CO
AQI 28
Good
4.12μg/m³
PM2.5
22.44μg/m³
PM10
30.31ppb
O3
0.44ppb
SO2
9.32ppb
NO2
0.19ppm
CO
AQI 33
Good
5.61μg/m³
PM2.5
24.08μg/m³
PM10
30.01ppb
O3
0.44ppb
SO2
14.30ppb
NO2
0.20ppm
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 11:00:00 on 2025-07-23.
In the last 24 hrs, the best air quality in San Dimas, California was observed at 03:00:00 on 2025-07-24.
The current air quality in San Dimas, California is 28, 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 4.879 μg/m3.
The current PM10 concentration at San Dimas, California is 23.392 μg/m3.
The current carbon monoxide (CO) concentration at San Dimas, California is 0.198 ppm.
The current sulfur dioxide (SO2) concentration at San Dimas, California is 0.439 ppb.
The current ozone (O3) concentration at San Dimas, California is 30.447 ppm.
The current nitrogen dioxide (NO2) concentration at San Dimas, California is 11.594 ppb.
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