Stay updated with real-time air quality in Grand Terrace, 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)
54
Moderate
Grand Terrace, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.01 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
48.32 μg/m³
0
55
155
255
425
605+
50.02 ppb
0
55
71
86
201
201+
3.51 ppb
0
36
76
186
605
1005+
9.66 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Grand Terrace, California
Grand Terrace, California
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AQI 77
Moderate
8.16μg/m³
PM2.5
36.16μg/m³
PM10
63.33ppb
O3
0.70ppb
SO2
6.46ppb
NO2
0.26ppm
CO
AQI 77
Moderate
8.16μg/m³
PM2.5
36.17μg/m³
PM10
63.45ppb
O3
0.70ppb
SO2
6.50ppb
NO2
0.26ppm
CO
AQI 74
Moderate
8.97μg/m³
PM2.5
35.73μg/m³
PM10
62.05ppb
O3
0.58ppb
SO2
5.83ppb
NO2
0.22ppm
CO
AQI 77
Moderate
8.09μg/m³
PM2.5
36.89μg/m³
PM10
63.08ppb
O3
0.69ppb
SO2
7.12ppb
NO2
0.27ppm
CO
AQI 74
Moderate
9.02μg/m³
PM2.5
37.36μg/m³
PM10
62.02ppb
O3
0.84ppb
SO2
8.16ppb
NO2
0.25ppm
CO
AQI 61
Moderate
8.38μg/m³
PM2.5
36.92μg/m³
PM10
58.16ppb
O3
0.71ppb
SO2
8.35ppb
NO2
0.26ppm
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 Grand Terrace, California is updated every hour.
The worst air quality in Grand Terrace, California in the last 24 hours was observed at 02:00:00 on 2026-04-24.
In the last 24 hrs, the best air quality in Grand Terrace, California was observed at 11:00:00 on 2026-04-23.
The current air quality in Grand Terrace, California is 77, categorized as Moderate based on real-time data.
The most common pollutant in Grand Terrace, California is O3.
If the air quality in Grand Terrace, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Grand Terrace, California is 8.681 μg/m3.
The current PM10 concentration at Grand Terrace, California is 36.982 μg/m3.
The current carbon monoxide (CO) concentration at Grand Terrace, California is 0.252 ppm.
The current sulfur dioxide (SO2) concentration at Grand Terrace, California is 0.717 ppb.
The current ozone (O3) concentration at Grand Terrace, California is 62.84 ppm.
The current nitrogen dioxide (NO2) concentration at Grand Terrace, California is 6.217 ppb.
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