Stay updated with real-time air quality in Mequon, Wisconsin 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
Mequon, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.08 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.35 μg/m³
0
55
155
255
425
605+
25.36 ppb
0
55
71
86
201
201+
1.28 ppb
0
36
76
186
605
1005+
5.09 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Mequon, Wisconsin
Mequon, Wisconsin
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AQI 23
Good
4.35μg/m³
PM2.5
13.97μg/m³
PM10
25.15ppb
O3
1.07ppb
SO2
7.88ppb
NO2
0.23ppm
CO
AQI 24
Good
4.35μg/m³
PM2.5
23.12μg/m³
PM10
25.52ppb
O3
1.24ppb
SO2
7.20ppb
NO2
0.27ppm
CO
AQI 24
Good
4.06μg/m³
PM2.5
14.13μg/m³
PM10
26.07ppb
O3
1.08ppb
SO2
8.05ppb
NO2
0.24ppm
CO
AQI 23
Good
4.41μg/m³
PM2.5
18.54μg/m³
PM10
24.81ppb
O3
1.09ppb
SO2
7.46ppb
NO2
0.23ppm
CO
AQI 24
Good
4.35μg/m³
PM2.5
23.12μg/m³
PM10
25.52ppb
O3
1.24ppb
SO2
7.20ppb
NO2
0.27ppm
CO
AQI 27
Good
4.51μg/m³
PM2.5
18.64μg/m³
PM10
24.81ppb
O3
1.10ppb
SO2
7.31ppb
NO2
0.24ppm
CO
Air quality and pollutant data for Wisconsin, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Mequon, Wisconsin is updated every hour for accuracy.
In the past 24 hours, the air quality in Mequon, Wisconsin was at its worst at 06:00:00 on 2026-01-25.
In the last 24 hours, the best air quality in Mequon, Wisconsin was observed at 03:00:00 on 2026-01-25.
As of now, the AQI in Mequon, Wisconsin is 27, indicating Good conditions.
Mequon, Wisconsin air has the highest levels of PM2.5.
Poor air quality in Mequon, Wisconsin means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Mequon, Wisconsin are currently 4.591 μg/m3.
The PM10 concentration in Mequon, Wisconsin is 13.89 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Mequon, Wisconsin is 0.233 ppm.
Currently, Mequon, Wisconsin has a sulfur dioxide (SO2) concentration of 1.262 ppb.
The current ozone (O3) level in Mequon, Wisconsin at the moment is 27.079 ppm.
Nitrogen dioxide (NO2) level in Mequon, Wisconsin at the moment is 7.202 ppb.
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