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)
34
Good
Hartford, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.55 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
6.16 μg/m³
0
55
155
255
425
605+
37.04 ppb
0
55
71
86
201
201+
0.25 ppb
0
36
76
186
605
1005+
5.58 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 34
Good
1.80μg/m³
PM2.5
6.74μg/m³
PM10
37.22ppb
O3
0.25ppb
SO2
5.30ppb
NO2
0.16ppm
CO
AQI 34
Good
1.44μg/m³
PM2.5
5.71μg/m³
PM10
36.76ppb
O3
0.26ppb
SO2
5.63ppb
NO2
0.15ppm
CO
AQI 34
Good
1.81μg/m³
PM2.5
7.16μg/m³
PM10
36.58ppb
O3
0.25ppb
SO2
5.11ppb
NO2
0.15ppm
CO
AQI 34
Good
1.82μg/m³
PM2.5
6.74μg/m³
PM10
37.19ppb
O3
0.26ppb
SO2
5.83ppb
NO2
0.17ppm
CO
AQI 34
Good
1.87μg/m³
PM2.5
7.10μg/m³
PM10
36.68ppb
O3
0.26ppb
SO2
5.38ppb
NO2
0.16ppm
CO
AQI 34
Good
1.79μg/m³
PM2.5
6.75μg/m³
PM10
37.21ppb
O3
0.24ppb
SO2
5.10ppb
NO2
0.14ppm
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 11:00:00 on 2026-04-27.
In the last 24 hours, the best air quality in Hartford, Wisconsin was observed at 01:00:00 on 2026-04-28.
As of now, the AQI in Hartford, Wisconsin is 34, indicating Good conditions.
Hartford, Wisconsin air has the highest levels of O3.
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 1.546 μg/m3.
The PM10 concentration in Hartford, Wisconsin is 6.162 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hartford, Wisconsin is 0.142 ppm.
Currently, Hartford, Wisconsin has a sulfur dioxide (SO2) concentration of 0.247 ppb.
The current ozone (O3) level in Hartford, Wisconsin at the moment is 37.041 ppm.
Nitrogen dioxide (NO2) level in Hartford, Wisconsin at the moment is 5.582 ppb.
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