Stay updated with real-time air quality in Highland, 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)
34
Good
Highland, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.52 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.98 μg/m³
0
55
155
255
425
605+
37.05 ppb
0
55
71
86
201
201+
0.69 ppb
0
36
76
186
605
1005+
8.69 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Highland, California
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AQI 36
Good
3.11μg/m³
PM2.5
12.84μg/m³
PM10
38.69ppb
O3
0.69ppb
SO2
8.17ppb
NO2
0.27ppm
CO
AQI 32
Good
3.11μg/m³
PM2.5
17.40μg/m³
PM10
35.25ppb
O3
0.69ppb
SO2
7.64ppb
NO2
0.27ppm
CO
AQI 33
Good
3.58μg/m³
PM2.5
16.33μg/m³
PM10
36.21ppb
O3
0.69ppb
SO2
7.77ppb
NO2
0.27ppm
CO
AQI 32
Good
5.03μg/m³
PM2.5
16.74μg/m³
PM10
34.97ppb
O3
0.68ppb
SO2
5.54ppb
NO2
0.28ppm
CO
AQI 33
Good
6.16μg/m³
PM2.5
17.29μg/m³
PM10
34.58ppb
O3
0.77ppb
SO2
13.89ppb
NO2
0.29ppm
CO
AQI 37
Good
4.28μg/m³
PM2.5
17.68μg/m³
PM10
39.56ppb
O3
0.68ppb
SO2
5.92ppb
NO2
0.28ppm
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 Highland, California is updated every hour.
The worst air quality in Highland, California in the last 24 hours was observed at 05:00:00 on 2025-12-07.
In the last 24 hrs, the best air quality in Highland, California was observed at 07:00:00 on 2025-12-07.
The current air quality in Highland, California is 34, categorized as Good based on real-time data.
The most common pollutant in Highland, California is O3.
If the air quality in Highland, California is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Highland, California is 3.522 μg/m3.
The current PM10 concentration at Highland, California is 12.977 μg/m3.
The current carbon monoxide (CO) concentration at Highland, California is 0.27 ppm.
The current sulfur dioxide (SO2) concentration at Highland, California is 0.688 ppb.
The current ozone (O3) concentration at Highland, California is 37.051 ppm.
The current nitrogen dioxide (NO2) concentration at Highland, California is 8.69 ppb.
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