Stay updated with real-time air quality in Fitchburg, 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)
31
Good
Fitchburg, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.11 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.79 μg/m³
0
55
155
255
425
605+
34.46 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
4.33 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Fitchburg, Wisconsin
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AQI 31
Good
4.05μg/m³
PM2.5
13.20μg/m³
PM10
34.43ppb
O3
0.63ppb
SO2
4.33ppb
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 33
Good
4.20μg/m³
PM2.5
14.64μg/m³
PM10
36.27ppb
O3
0.65ppb
SO2
4.29ppb
NO2
0.20ppm
CO
AQI 31
Good
4.08μg/m³
PM2.5
12.54μg/m³
PM10
34.39ppb
O3
0.64ppb
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 31
Good
4.15μg/m³
PM2.5
14.23μg/m³
PM10
34.27ppb
O3
0.63ppb
SO2
4.34ppb
NO2
0.20ppm
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 Fitchburg, Wisconsin is updated every hour for accuracy.
In the past 24 hours, the air quality in Fitchburg, Wisconsin was at its worst at 11:00:00 on 2026-03-08.
In the last 24 hours, the best air quality in Fitchburg, Wisconsin was observed at 03:00:00 on 2026-03-09.
As of now, the AQI in Fitchburg, Wisconsin is 31, indicating Good conditions.
Fitchburg, Wisconsin air has the highest levels of O3.
Poor air quality in Fitchburg, Wisconsin means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Fitchburg, Wisconsin are currently 4.11 μg/m3.
The PM10 concentration in Fitchburg, Wisconsin is 13.789 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Fitchburg, Wisconsin is 0.2 ppm.
Currently, Fitchburg, Wisconsin has a sulfur dioxide (SO2) concentration of 0.634 ppb.
The current ozone (O3) level in Fitchburg, Wisconsin at the moment is 34.458 ppm.
Nitrogen dioxide (NO2) level in Fitchburg, Wisconsin at the moment is 4.329 ppb.
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