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)
54
Moderate
Hartford, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.18 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
47.03 μg/m³
0
55
155
255
425
605+
27.12 ppb
0
55
71
86
201
201+
0.83 ppb
0
36
76
186
605
1005+
8.02 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Hartford, Wisconsin
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AQI 49
Good
8.61μg/m³
PM2.5
16.96μg/m³
PM10
30.84ppb
O3
0.87ppb
SO2
8.47ppb
NO2
0.16ppm
CO
AQI 44
Good
8.41μg/m³
PM2.5
14.49μg/m³
PM10
31.49ppb
O3
0.87ppb
SO2
8.38ppb
NO2
0.15ppm
CO
AQI 49
Good
8.74μg/m³
PM2.5
15.24μg/m³
PM10
31.76ppb
O3
0.82ppb
SO2
8.46ppb
NO2
0.15ppm
CO
AQI 49
Good
8.51μg/m³
PM2.5
26.45μg/m³
PM10
29.32ppb
O3
0.96ppb
SO2
8.54ppb
NO2
0.17ppm
CO
AQI 49
Good
8.78μg/m³
PM2.5
14.59μg/m³
PM10
30.09ppb
O3
0.89ppb
SO2
8.51ppb
NO2
0.16ppm
CO
AQI 49
Good
8.59μg/m³
PM2.5
29.16μg/m³
PM10
29.78ppb
O3
0.76ppb
SO2
8.02ppb
NO2
0.15ppm
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 03:00:00 on 2025-12-09.
In the last 24 hours, the best air quality in Hartford, Wisconsin was observed at 07:00:00 on 2025-12-08.
As of now, the AQI in Hartford, Wisconsin is 52, 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 10.229 μg/m3.
The PM10 concentration in Hartford, Wisconsin is 38.923 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hartford, Wisconsin is 0.143 ppm.
Currently, Hartford, Wisconsin has a sulfur dioxide (SO2) concentration of 0.806 ppb.
The current ozone (O3) level in Hartford, Wisconsin at the moment is 26.831 ppm.
Nitrogen dioxide (NO2) level in Hartford, Wisconsin at the moment is 8.378 ppb.
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