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

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.91 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.20 μg/m³
0
55
155
255
425
605+
25.27 ppb
0
55
71
86
201
201+
1.10 ppb
0
36
76
186
605
1005+
9.31 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Highland Park, Illinois
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AQI 33
Good
6.38μg/m³
PM2.5
19.51μg/m³
PM10
27.11ppb
O3
1.24ppb
SO2
17.15ppb
NO2
0.32ppm
CO
AQI 33
Good
5.94μg/m³
PM2.5
15.16μg/m³
PM10
27.54ppb
O3
1.25ppb
SO2
17.39ppb
NO2
0.32ppm
CO
AQI 33
Good
5.92μg/m³
PM2.5
18.63μg/m³
PM10
27.31ppb
O3
1.22ppb
SO2
16.04ppb
NO2
0.33ppm
CO
AQI 33
Good
6.24μg/m³
PM2.5
20.75μg/m³
PM10
27.83ppb
O3
1.25ppb
SO2
16.45ppb
NO2
0.34ppm
CO
AQI 44
Good
7.63μg/m³
PM2.5
30.29μg/m³
PM10
25.44ppb
O3
1.24ppb
SO2
16.64ppb
NO2
0.32ppm
CO
AQI 44
Good
7.72μg/m³
PM2.5
31.09μg/m³
PM10
26.02ppb
O3
1.24ppb
SO2
16.08ppb
NO2
0.32ppm
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 04:00:00, 2025-10-25.
The best air quality in Highland Park, Illinois was observed at 08:00:00 on 2025-10-25.
The air quality in Highland Park, Illinois right now is Good, with an AQI of 33.
In Highland Park, Illinois, PM2.5 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 5.692 μg/m3.
Highland Park, Illinois currently has a PM10 concentration of 13.145 μg/m3.
The current carbon monoxide (CO) level in Highland Park, Illinois is 0.319 ppm.
The current sulfur dioxide (SO2) concentration in Highland Park, Illinois is 1.253 ppb.
Highland Park, Illinois currently has an ozone (O3) concentration of 27.807 ppm.
The current level of nitrogen dioxide (NO2) in Highland Park, Illinois is 17.402 ppb.
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