Stay updated with real-time air quality in Highland Park, Illinois 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)
37
Good
Highland Park, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.92 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.40 μg/m³
0
55
155
255
425
605+
39.96 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
3.37 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Highland Park, Illinois
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AQI 26
Good
3.42μg/m³
PM2.5
12.02μg/m³
PM10
28.43ppb
O3
0.56ppb
SO2
11.72ppb
NO2
0.27ppm
CO
AQI 27
Good
3.03μg/m³
PM2.5
9.50μg/m³
PM10
28.72ppb
O3
0.56ppb
SO2
11.69ppb
NO2
0.27ppm
CO
AQI 27
Good
3.83μg/m³
PM2.5
13.53μg/m³
PM10
28.75ppb
O3
0.55ppb
SO2
11.28ppb
NO2
0.27ppm
CO
AQI 26
Good
3.76μg/m³
PM2.5
13.77μg/m³
PM10
28.14ppb
O3
0.57ppb
SO2
12.19ppb
NO2
0.27ppm
CO
AQI 25
Good
4.15μg/m³
PM2.5
17.40μg/m³
PM10
26.80ppb
O3
0.55ppb
SO2
11.61ppb
NO2
0.27ppm
CO
AQI 26
Good
4.21μg/m³
PM2.5
17.89μg/m³
PM10
27.51ppb
O3
0.56ppb
SO2
11.57ppb
NO2
0.27ppm
CO
The air quality data for Illinois, 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 Highland Park, Illinois are available every hour.
Highland Park, Illinois experienced its worst air quality at 08:00:00, 2025-07-24.
The best air quality in Highland Park, Illinois was observed at 01:00:00 on 2025-07-25.
The air quality in Highland Park, Illinois right now is Good, with an AQI of 27.
In Highland Park, Illinois, O3 is the most frequently found pollutant.
When air quality in Highland Park, Illinois is compromised, staying indoors and wearing a mask can reduce health risks.
Highland Park, Illinois currently has a PM2.5 concentration of 2.878 μg/m3.
Highland Park, Illinois currently has a PM10 concentration of 8.481 μg/m3.
The current carbon monoxide (CO) level in Highland Park, Illinois is 0.274 ppm.
The current sulfur dioxide (SO2) concentration in Highland Park, Illinois is 0.56 ppb.
Highland Park, Illinois currently has an ozone (O3) concentration of 28.733 ppm.
The current level of nitrogen dioxide (NO2) in Highland Park, Illinois is 11.748 ppb.
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