Stay updated with real-time air quality in Montclair, 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
Montclair, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
32.03 μg/m³
0
55
155
255
425
605+
44.38 ppb
0
55
71
86
201
201+
1.08 ppb
0
36
76
186
605
1005+
23.49 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Montclair, California
Scroll To Air Quality MapLoading...
AQI 44
Good
6.29μg/m³
PM2.5
23.57μg/m³
PM10
48.04ppb
O3
1.03ppb
SO2
10.48ppb
NO2
0.33ppm
CO
AQI 49
Good
8.60μg/m³
PM2.5
30.03μg/m³
PM10
48.33ppb
O3
0.89ppb
SO2
27.93ppb
NO2
0.31ppm
CO
AQI 49
Good
8.62μg/m³
PM2.5
30.44μg/m³
PM10
50.15ppb
O3
0.96ppb
SO2
24.67ppb
NO2
0.31ppm
CO
AQI 46
Good
6.54μg/m³
PM2.5
26.33μg/m³
PM10
49.85ppb
O3
0.94ppb
SO2
17.71ppb
NO2
0.33ppm
CO
AQI 49
Good
8.53μg/m³
PM2.5
30.05μg/m³
PM10
49.05ppb
O3
0.91ppb
SO2
26.00ppb
NO2
0.31ppm
CO
AQI 44
Good
5.66μg/m³
PM2.5
23.78μg/m³
PM10
47.91ppb
O3
0.99ppb
SO2
11.24ppb
NO2
0.34ppm
CO
The air quality data for California, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Montclair, California are available every hour.
Montclair, California experienced its worst air quality at 11:00:00, 2026-04-23.
The best air quality in Montclair, California was observed at 10:00:00 on 2026-04-23.
The air quality in Montclair, California right now is Good, with an AQI of 44.
In Montclair, California, PM2.5 is the most frequently found pollutant.
When air quality in Montclair, California is compromised, staying indoors and wearing a mask can reduce health risks.
Montclair, California currently has a PM2.5 concentration of 7.677 μg/m3.
Montclair, California currently has a PM10 concentration of 32.03 μg/m3.
The current carbon monoxide (CO) level in Montclair, California is 0.312 ppm.
The current sulfur dioxide (SO2) concentration in Montclair, California is 1.081 ppb.
Montclair, California currently has an ozone (O3) concentration of 44.382 ppm.
The current level of nitrogen dioxide (NO2) in Montclair, California is 23.49 ppb.
All Rights Reserved © Ambee Inc. 2025