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)
44
Good
Highland Park, Illinois
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.77 μg/m³
0
55
155
255
425
605+
24.82 ppb
0
55
71
86
201
201+
0.83 ppb
0
36
76
186
605
1005+
2.50 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Highland Park, Illinois
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AQI 49
Good
9.34μg/m³
PM2.5
29.99μg/m³
PM10
20.20ppb
O3
0.63ppb
SO2
5.18ppb
NO2
0.24ppm
CO
AQI 49
Good
8.97μg/m³
PM2.5
25.21μg/m³
PM10
20.16ppb
O3
0.64ppb
SO2
5.17ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.50μg/m³
PM2.5
31.83μg/m³
PM10
20.10ppb
O3
0.63ppb
SO2
5.19ppb
NO2
0.24ppm
CO
AQI 49
Good
9.49μg/m³
PM2.5
31.66μg/m³
PM10
19.98ppb
O3
0.63ppb
SO2
5.20ppb
NO2
0.24ppm
CO
AQI 52
Moderate
10.09μg/m³
PM2.5
40.23μg/m³
PM10
20.43ppb
O3
0.63ppb
SO2
5.19ppb
NO2
0.24ppm
CO
AQI 52
Moderate
10.15μg/m³
PM2.5
40.98μg/m³
PM10
20.75ppb
O3
0.63ppb
SO2
5.18ppb
NO2
0.24ppm
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, 2025-11-15.
The best air quality in Highland Park, Illinois was observed at 01:00:00 on 2025-11-14.
The air quality in Highland Park, Illinois right now is Good, with an AQI of 49.
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 8.548 μg/m3.
Highland Park, Illinois currently has a PM10 concentration of 22.242 μg/m3.
The current carbon monoxide (CO) level in Highland Park, Illinois is 0.202 ppm.
The current sulfur dioxide (SO2) concentration in Highland Park, Illinois is 0.649 ppb.
Highland Park, Illinois currently has an ozone (O3) concentration of 21.814 ppm.
The current level of nitrogen dioxide (NO2) in Highland Park, Illinois is 3.795 ppb.
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