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)
38
Good
Highland, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
29.12 μg/m³
0
55
155
255
425
605+
33.90 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
7.27 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Highland, California
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AQI 49
Good
8.59μg/m³
PM2.5
34.32μg/m³
PM10
30.73ppb
O3
0.30ppb
SO2
7.01ppb
NO2
0.19ppm
CO
AQI 38
Good
7.22μg/m³
PM2.5
31.64μg/m³
PM10
32.20ppb
O3
0.30ppb
SO2
8.01ppb
NO2
0.20ppm
CO
AQI 44
Good
7.87μg/m³
PM2.5
30.56μg/m³
PM10
32.69ppb
O3
0.29ppb
SO2
7.35ppb
NO2
0.20ppm
CO
AQI 44
Good
8.25μg/m³
PM2.5
29.88μg/m³
PM10
32.90ppb
O3
0.29ppb
SO2
7.12ppb
NO2
0.20ppm
CO
AQI 38
Good
7.49μg/m³
PM2.5
24.86μg/m³
PM10
35.62ppb
O3
0.28ppb
SO2
7.81ppb
NO2
0.20ppm
CO
AQI 52
Moderate
10.24μg/m³
PM2.5
30.60μg/m³
PM10
32.08ppb
O3
0.28ppb
SO2
6.25ppb
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 Highland, California is updated every hour.
The worst air quality in Highland, California in the last 24 hours was observed at 01:00:00 on 2026-06-08.
In the last 24 hrs, the best air quality in Highland, California was observed at 03:00:00 on 2026-06-08.
The current air quality in Highland, California is 38, categorized as Good based on real-time data.
The most common pollutant in Highland, California is PM2.5.
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 7.212 μg/m3.
The current PM10 concentration at Highland, California is 29.12 μg/m3.
The current carbon monoxide (CO) concentration at Highland, California is 0.194 ppm.
The current sulfur dioxide (SO2) concentration at Highland, California is 0.294 ppb.
The current ozone (O3) concentration at Highland, California is 33.896 ppm.
The current nitrogen dioxide (NO2) concentration at Highland, California is 7.267 ppb.
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