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)
42
Good
Hartford, Wisconsin
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.55 μg/m³
0
55
155
255
425
605+
45.16 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
7.37 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Hartford, Wisconsin
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AQI 43
Good
2.59μg/m³
PM2.5
10.39μg/m³
PM10
45.57ppb
O3
0.31ppb
SO2
7.86ppb
NO2
0.19ppm
CO
AQI 42
Good
2.52μg/m³
PM2.5
9.54μg/m³
PM10
45.00ppb
O3
0.32ppb
SO2
7.65ppb
NO2
0.18ppm
CO
AQI 41
Good
2.60μg/m³
PM2.5
9.38μg/m³
PM10
44.15ppb
O3
0.33ppb
SO2
6.27ppb
NO2
0.18ppm
CO
AQI 43
Good
2.59μg/m³
PM2.5
11.45μg/m³
PM10
46.36ppb
O3
0.28ppb
SO2
8.29ppb
NO2
0.21ppm
CO
AQI 42
Good
2.60μg/m³
PM2.5
10.39μg/m³
PM10
44.82ppb
O3
0.30ppb
SO2
8.02ppb
NO2
0.20ppm
CO
AQI 41
Good
2.61μg/m³
PM2.5
9.56μg/m³
PM10
44.10ppb
O3
0.35ppb
SO2
6.15ppb
NO2
0.17ppm
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 2026-06-15.
In the last 24 hours, the best air quality in Hartford, Wisconsin was observed at 11:00:00 on 2026-06-15.
As of now, the AQI in Hartford, Wisconsin is 42, 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 2.604 μg/m3.
The PM10 concentration in Hartford, Wisconsin is 9.555 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hartford, Wisconsin is 0.162 ppm.
Currently, Hartford, Wisconsin has a sulfur dioxide (SO2) concentration of 0.34 ppb.
The current ozone (O3) level in Hartford, Wisconsin at the moment is 45.165 ppm.
Nitrogen dioxide (NO2) level in Hartford, Wisconsin at the moment is 7.367 ppb.
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