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)
55
Moderate
Hartford, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.48 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
62.65 μg/m³
0
55
155
255
425
605+
25.41 ppb
0
55
71
86
201
201+
0.47 ppb
0
36
76
186
605
1005+
2.27 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 62
Moderate
15.17μg/m³
PM2.5
61.13μg/m³
PM10
23.22ppb
O3
0.47ppb
SO2
2.33ppb
NO2
0.24ppm
CO
AQI 62
Moderate
14.72μg/m³
PM2.5
69.30μg/m³
PM10
24.34ppb
O3
0.44ppb
SO2
2.42ppb
NO2
0.24ppm
CO
AQI 64
Moderate
15.87μg/m³
PM2.5
71.51μg/m³
PM10
23.54ppb
O3
0.49ppb
SO2
2.42ppb
NO2
0.24ppm
CO
AQI 62
Moderate
14.72μg/m³
PM2.5
72.27μg/m³
PM10
23.70ppb
O3
0.40ppb
SO2
2.26ppb
NO2
0.25ppm
CO
AQI 65
Moderate
16.10μg/m³
PM2.5
82.67μg/m³
PM10
22.98ppb
O3
0.47ppb
SO2
2.43ppb
NO2
0.25ppm
CO
AQI 66
Moderate
14.73μg/m³
PM2.5
86.25μg/m³
PM10
24.32ppb
O3
0.50ppb
SO2
2.30ppb
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 03:00:00 on 2026-08-23.
In the last 24 hours, the best air quality in Hartford, Wisconsin was observed at 03:00:00 on 2026-08-23.
As of now, the AQI in Hartford, Wisconsin is 60, indicating Moderate conditions.
Hartford, Wisconsin air has the highest levels of PM10.
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 14.469 μg/m3.
The PM10 concentration in Hartford, Wisconsin is 73.323 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hartford, Wisconsin is 0.232 ppm.
Currently, Hartford, Wisconsin has a sulfur dioxide (SO2) concentration of 0.469 ppb.
The current ozone (O3) level in Hartford, Wisconsin at the moment is 24.126 ppm.
Nitrogen dioxide (NO2) level in Hartford, Wisconsin at the moment is 2.273 ppb.
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