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)
38
Good
Hartford, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.97 μg/m³
0
55
155
255
425
605+
33.20 ppb
0
55
71
86
201
201+
1.05 ppb
0
36
76
186
605
1005+
6.12 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Hartford, Wisconsin
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AQI 29
Good
5.44μg/m³
PM2.5
19.94μg/m³
PM10
31.08ppb
O3
1.08ppb
SO2
6.08ppb
NO2
0.16ppm
CO
AQI 29
Good
5.00μg/m³
PM2.5
21.54μg/m³
PM10
31.12ppb
O3
1.06ppb
SO2
5.50ppb
NO2
0.15ppm
CO
AQI 33
Good
6.47μg/m³
PM2.5
18.67μg/m³
PM10
30.53ppb
O3
1.05ppb
SO2
5.62ppb
NO2
0.15ppm
CO
AQI 30
Good
5.18μg/m³
PM2.5
20.84μg/m³
PM10
31.66ppb
O3
1.11ppb
SO2
5.79ppb
NO2
0.17ppm
CO
AQI 33
Good
5.89μg/m³
PM2.5
21.76μg/m³
PM10
30.57ppb
O3
1.08ppb
SO2
6.11ppb
NO2
0.16ppm
CO
AQI 38
Good
6.53μg/m³
PM2.5
14.89μg/m³
PM10
31.12ppb
O3
1.03ppb
SO2
5.60ppb
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 07:00:00 on 2026-01-25.
In the last 24 hours, the best air quality in Hartford, Wisconsin was observed at 04:00:00 on 2026-01-25.
As of now, the AQI in Hartford, Wisconsin is 38, indicating Good 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 6.636 μg/m3.
The PM10 concentration in Hartford, Wisconsin is 19.972 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 1.046 ppb.
The current ozone (O3) level in Hartford, Wisconsin at the moment is 33.202 ppm.
Nitrogen dioxide (NO2) level in Hartford, Wisconsin at the moment is 6.119 ppb.
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