Stay updated with real-time air quality in Hartford, 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)
56
Moderate
Hartford, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.79 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
43.53 μg/m³
0
55
155
255
425
605+
33.67 ppb
0
55
71
86
201
201+
0.71 ppb
0
36
76
186
605
1005+
6.38 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Hartford, Wisconsin
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AQI 56
Moderate
11.98μg/m³
PM2.5
51.55μg/m³
PM10
30.99ppb
O3
0.67ppb
SO2
5.44ppb
NO2
0.24ppm
CO
AQI 56
Moderate
11.59μg/m³
PM2.5
48.65μg/m³
PM10
31.37ppb
O3
0.71ppb
SO2
5.73ppb
NO2
0.23ppm
CO
AQI 56
Moderate
12.13μg/m³
PM2.5
47.31μg/m³
PM10
35.39ppb
O3
0.65ppb
SO2
5.97ppb
NO2
0.23ppm
CO
AQI 58
Moderate
12.73μg/m³
PM2.5
63.76μg/m³
PM10
32.45ppb
O3
0.70ppb
SO2
4.12ppb
NO2
0.25ppm
CO
AQI 56
Moderate
11.86μg/m³
PM2.5
51.51μg/m³
PM10
33.74ppb
O3
0.67ppb
SO2
3.63ppb
NO2
0.24ppm
CO
AQI 52
Moderate
10.38μg/m³
PM2.5
51.45μg/m³
PM10
36.59ppb
O3
0.61ppb
SO2
6.08ppb
NO2
0.23ppm
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 Hartford, Wisconsin is updated every hour for accuracy.
In the past 24 hours, the air quality in Hartford, Wisconsin was at its worst at 07:00:00 on 2026-10-22.
In the last 24 hours, the best air quality in Hartford, Wisconsin was observed at 03:00:00 on 2026-10-22.
As of now, the AQI in Hartford, Wisconsin is 56, indicating Moderate conditions.
Hartford, Wisconsin air has the highest levels of PM2.5.
Poor air quality in Hartford, Wisconsin means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Hartford, Wisconsin are currently 11.791 μg/m3.
The PM10 concentration in Hartford, Wisconsin is 43.531 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hartford, Wisconsin is 0.226 ppm.
Currently, Hartford, Wisconsin has a sulfur dioxide (SO2) concentration of 0.71 ppb.
The current ozone (O3) level in Hartford, Wisconsin at the moment is 33.67 ppm.
Nitrogen dioxide (NO2) level in Hartford, Wisconsin at the moment is 6.383 ppb.
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