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)
27
Good
Highland Park, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.98 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.92 μg/m³
0
55
155
255
425
605+
25.04 ppb
0
55
71
86
201
201+
1.15 ppb
0
36
76
186
605
1005+
15.06 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Highland Park, Illinois
Scroll To Air Quality MapLoading...
AQI 33
Good
5.73μg/m³
PM2.5
22.45μg/m³
PM10
25.16ppb
O3
1.17ppb
SO2
14.85ppb
NO2
0.28ppm
CO
AQI 27
Good
5.16μg/m³
PM2.5
19.05μg/m³
PM10
25.11ppb
O3
1.15ppb
SO2
14.99ppb
NO2
0.28ppm
CO
AQI 33
Good
5.84μg/m³
PM2.5
23.26μg/m³
PM10
25.23ppb
O3
1.13ppb
SO2
14.72ppb
NO2
0.28ppm
CO
AQI 33
Good
5.91μg/m³
PM2.5
23.53μg/m³
PM10
25.02ppb
O3
1.19ppb
SO2
14.82ppb
NO2
0.28ppm
CO
AQI 38
Good
6.98μg/m³
PM2.5
29.92μg/m³
PM10
25.35ppb
O3
1.20ppb
SO2
14.52ppb
NO2
0.27ppm
CO
AQI 38
Good
6.69μg/m³
PM2.5
28.79μg/m³
PM10
25.49ppb
O3
1.19ppb
SO2
14.46ppb
NO2
0.28ppm
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 10:00:00, 2026-01-24.
The best air quality in Highland Park, Illinois was observed at 11:00:00 on 2026-01-24.
The air quality in Highland Park, Illinois right now is Good, with an AQI of 27.
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 4.984 μg/m3.
Highland Park, Illinois currently has a PM10 concentration of 17.922 μg/m3.
The current carbon monoxide (CO) level in Highland Park, Illinois is 0.278 ppm.
The current sulfur dioxide (SO2) concentration in Highland Park, Illinois is 1.149 ppb.
Highland Park, Illinois currently has an ozone (O3) concentration of 25.041 ppm.
The current level of nitrogen dioxide (NO2) in Highland Park, Illinois is 15.058 ppb.
All Rights Reserved © Ambee Inc. 2025