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)
44
Good
Monroe, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.12 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
39.06 μg/m³
0
55
155
255
425
605+
21.09 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
5.57 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Monroe, Wisconsin
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AQI 44
Good
8.04μg/m³
PM2.5
34.16μg/m³
PM10
22.11ppb
O3
0.59ppb
SO2
5.30ppb
NO2
0.19ppm
CO
AQI 44
Good
8.27μg/m³
PM2.5
13.77μg/m³
PM10
16.46ppb
O3
0.54ppb
SO2
5.80ppb
NO2
0.18ppm
CO
AQI 44
Good
7.83μg/m³
PM2.5
20.00μg/m³
PM10
16.54ppb
O3
0.53ppb
SO2
5.70ppb
NO2
0.18ppm
CO
AQI 49
Good
8.74μg/m³
PM2.5
20.55μg/m³
PM10
19.43ppb
O3
0.54ppb
SO2
5.74ppb
NO2
0.18ppm
CO
AQI 44
Good
8.40μg/m³
PM2.5
15.09μg/m³
PM10
16.42ppb
O3
0.77ppb
SO2
5.92ppb
NO2
0.18ppm
CO
AQI 44
Good
8.06μg/m³
PM2.5
37.52μg/m³
PM10
13.16ppb
O3
0.63ppb
SO2
6.16ppb
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 07:00:00 on 2025-12-07.
In the last 24 hrs, the best air quality in Monroe, Wisconsin was observed at 08:00:00 on 2025-12-06.
The current air quality in Monroe, Wisconsin is 44, categorized as Good based on real-time data.
The most common pollutant in Monroe, Wisconsin is PM2.5.
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 8.119 μg/m3.
The current PM10 concentration at Monroe, Wisconsin is 39.063 μg/m3.
The current carbon monoxide (CO) concentration at Monroe, Wisconsin is 0.19 ppm.
The current sulfur dioxide (SO2) concentration at Monroe, Wisconsin is 0.506 ppb.
The current ozone (O3) concentration at Monroe, Wisconsin is 21.094 ppm.
The current nitrogen dioxide (NO2) concentration at Monroe, Wisconsin is 5.574 ppb.
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