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)
43
Good
Highland Park, Illinois
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.17 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.96 μg/m³
0
55
155
255
425
605+
46.18 ppb
0
55
71
86
201
201+
1.13 ppb
0
36
76
186
605
1005+
2.00 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Highland Park, Illinois
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AQI 43
Good
4.39μg/m³
PM2.5
17.31μg/m³
PM10
45.86ppb
O3
1.13ppb
SO2
4.31ppb
NO2
0.20ppm
CO
AQI 43
Good
4.23μg/m³
PM2.5
16.40μg/m³
PM10
45.96ppb
O3
1.13ppb
SO2
3.01ppb
NO2
0.20ppm
CO
AQI 44
Good
4.37μg/m³
PM2.5
17.22μg/m³
PM10
47.55ppb
O3
1.11ppb
SO2
2.43ppb
NO2
0.20ppm
CO
AQI 44
Good
4.49μg/m³
PM2.5
17.38μg/m³
PM10
47.19ppb
O3
1.13ppb
SO2
2.23ppb
NO2
0.19ppm
CO
AQI 41
Good
4.84μg/m³
PM2.5
20.27μg/m³
PM10
44.43ppb
O3
1.15ppb
SO2
7.30ppb
NO2
0.20ppm
CO
AQI 42
Good
4.90μg/m³
PM2.5
20.60μg/m³
PM10
45.24ppb
O3
1.14ppb
SO2
4.79ppb
NO2
0.20ppm
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 06:00:00, 2025-09-09.
The best air quality in Highland Park, Illinois was observed at 06:00:00 on 2025-09-09.
The air quality in Highland Park, Illinois right now is Good, with an AQI of 43.
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 4.174 μg/m3.
Highland Park, Illinois currently has a PM10 concentration of 15.955 μg/m3.
The current carbon monoxide (CO) level in Highland Park, Illinois is 0.198 ppm.
The current sulfur dioxide (SO2) concentration in Highland Park, Illinois is 1.129 ppb.
Highland Park, Illinois currently has an ozone (O3) concentration of 46.181 ppm.
The current level of nitrogen dioxide (NO2) in Highland Park, Illinois is 1.995 ppb.
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