Stay updated with real-time air quality in Monroe, 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)
34
Good
Monroe, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.79 μg/m³
0
55
155
255
425
605+
37.28 ppb
0
55
71
86
201
201+
0.72 ppb
0
36
76
186
605
1005+
3.99 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Monroe, Wisconsin
Scroll To Air Quality MapLoading...
AQI 37
Good
6.31μg/m³
PM2.5
23.99μg/m³
PM10
39.67ppb
O3
0.89ppb
SO2
3.92ppb
NO2
0.20ppm
CO
AQI 33
Good
4.20μg/m³
PM2.5
14.64μg/m³
PM10
36.27ppb
O3
0.65ppb
SO2
4.29ppb
NO2
0.20ppm
CO
AQI 32
Good
4.35μg/m³
PM2.5
15.84μg/m³
PM10
34.54ppb
O3
0.66ppb
SO2
4.42ppb
NO2
0.20ppm
CO
AQI 31
Good
4.11μg/m³
PM2.5
13.79μg/m³
PM10
34.46ppb
O3
0.63ppb
SO2
4.33ppb
NO2
0.20ppm
CO
AQI 33
Good
4.25μg/m³
PM2.5
14.82μg/m³
PM10
36.49ppb
O3
0.63ppb
SO2
4.30ppb
NO2
0.19ppm
CO
AQI 37
Good
5.86μg/m³
PM2.5
19.77μg/m³
PM10
39.69ppb
O3
0.77ppb
SO2
4.19ppb
NO2
0.19ppm
CO
Air quality data and pollutant measurements for Wisconsin, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Monroe, Wisconsin is updated every hour.
The worst air quality in Monroe, Wisconsin in the last 24 hours was observed at 12:00:00 on 2026-03-09.
In the last 24 hrs, the best air quality in Monroe, Wisconsin was observed at 02:00:00 on 2026-03-09.
The current air quality in Monroe, Wisconsin is 34, categorized as Good based on real-time data.
The most common pollutant in Monroe, Wisconsin is O3.
If the air quality in Monroe, Wisconsin is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Monroe, Wisconsin is 5.203 μg/m3.
The current PM10 concentration at Monroe, Wisconsin is 19.786 μg/m3.
The current carbon monoxide (CO) concentration at Monroe, Wisconsin is 0.183 ppm.
The current sulfur dioxide (SO2) concentration at Monroe, Wisconsin is 0.722 ppb.
The current ozone (O3) concentration at Monroe, Wisconsin is 37.279 ppm.
The current nitrogen dioxide (NO2) concentration at Monroe, Wisconsin is 3.988 ppb.
All Rights Reserved © Ambee Inc. 2025