Stay updated with real-time air quality in Watertown, 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)
67
Moderate
Watertown, Wisconsin
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
17.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
81.23 μg/m³
0
55
155
255
425
605+
44.02 ppb
0
55
71
86
201
201+
1.46 ppb
0
36
76
186
605
1005+
4.89 ppb
0
54
101
361
1250
2050+
0.65 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Watertown, Wisconsin
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AQI 71
Moderate
16.68μg/m³
PM2.5
59.72μg/m³
PM10
60.80ppb
O3
0.84ppb
SO2
1.74ppb
NO2
1.04ppm
CO
AQI 69
Moderate
19.14μg/m³
PM2.5
72.33μg/m³
PM10
57.62ppb
O3
0.92ppb
SO2
1.71ppb
NO2
1.49ppm
CO
AQI 73
Moderate
20.50μg/m³
PM2.5
81.95μg/m³
PM10
59.72ppb
O3
0.88ppb
SO2
1.73ppb
NO2
1.01ppm
CO
AQI 67
Moderate
16.66μg/m³
PM2.5
57.67μg/m³
PM10
59.98ppb
O3
0.84ppb
SO2
1.73ppb
NO2
1.12ppm
CO
AQI 66
Moderate
16.70μg/m³
PM2.5
59.76μg/m³
PM10
58.55ppb
O3
0.82ppb
SO2
1.75ppb
NO2
0.90ppm
CO
AQI 66
Moderate
16.62μg/m³
PM2.5
45.37μg/m³
PM10
58.55ppb
O3
0.80ppb
SO2
1.73ppb
NO2
0.86ppm
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 Watertown, Wisconsin is updated every hour for accuracy.
In the past 24 hours, the air quality in Watertown, Wisconsin was at its worst at 06:00:00 on 2025-07-22.
In the last 24 hours, the best air quality in Watertown, Wisconsin was observed at 09:00:00 on 2025-07-22.
As of now, the AQI in Watertown, Wisconsin is 64, indicating Moderate conditions.
Watertown, Wisconsin air has the highest levels of O3.
Poor air quality in Watertown, Wisconsin means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Watertown, Wisconsin are currently 15.499 μg/m3.
The PM10 concentration in Watertown, Wisconsin is 47.6 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Watertown, Wisconsin is 1.3 ppm.
Currently, Watertown, Wisconsin has a sulfur dioxide (SO2) concentration of 0.895 ppb.
The current ozone (O3) level in Watertown, Wisconsin at the moment is 58.687 ppm.
Nitrogen dioxide (NO2) level in Watertown, Wisconsin at the moment is 1.73 ppb.
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