Stay updated with real-time air quality in Claremont, 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)
133
Unhealthy for sensitive groups
Claremont, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
13.69 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
53.98 μg/m³
0
55
155
255
425
605+
79.98 ppb
0
55
71
86
201
201+
0.89 ppb
0
36
76
186
605
1005+
16.85 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Claremont, California
Claremont, California
Scroll To Air Quality MapLoading...
AQI 129
Unhealthy for sensitive groups
14.99μg/m³
PM2.5
62.32μg/m³
PM10
79.38ppb
O3
0.86ppb
SO2
17.73ppb
NO2
0.32ppm
CO
AQI 136
Unhealthy for sensitive groups
14.79μg/m³
PM2.5
60.37μg/m³
PM10
81.38ppb
O3
0.94ppb
SO2
12.72ppb
NO2
0.29ppm
CO
AQI 129
Unhealthy for sensitive groups
14.89μg/m³
PM2.5
62.40μg/m³
PM10
78.68ppb
O3
0.91ppb
SO2
14.57ppb
NO2
0.31ppm
CO
AQI 129
Unhealthy for sensitive groups
14.89μg/m³
PM2.5
62.62μg/m³
PM10
78.59ppb
O3
0.85ppb
SO2
18.84ppb
NO2
0.33ppm
CO
AQI 126
Unhealthy for sensitive groups
14.93μg/m³
PM2.5
62.40μg/m³
PM10
78.32ppb
O3
0.86ppb
SO2
20.41ppb
NO2
0.32ppm
CO
AQI 143
Unhealthy for sensitive groups
15.55μg/m³
PM2.5
62.09μg/m³
PM10
83.19ppb
O3
0.97ppb
SO2
9.62ppb
NO2
0.29ppm
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 Claremont, California is updated on an hourly basis.
The worst air quality in Claremont, California was recorded at 09:00:00 on 2026-07-23.
The best air quality in Claremont, California was recorded at 10:00:00 on 2026-07-23.
The real-time air quality index in Claremont, California is 133, currently categorized as Unhealthy for Sensitive Groups.
The most common pollutant in Claremont, California is O3.
If the air quality in Claremont, California is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Claremont, California at present are 13.69 μg/m3.
The current PM10 levels in Claremont, California are 53.976 μg/m3.
The current carbon monoxide (CO) level in Claremont, California is 0.299 ppm.
The current sulfur dioxide (SO2) levels in Claremont, California are 0.892 ppb.
The current ozone (O3) levels at Claremont, California is 79.978 ppm.
The current nitrogen dioxide (NO2) levels at Claremont, California is 16.847 ppb.
All Rights Reserved © Ambee Inc. 2025