Stay updated with real-time air quality in Northfield, Minnesota 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)
22
Good
Northfield, Minnesota
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.49 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.22 μg/m³
0
55
155
255
425
605+
12.00 ppb
0
55
71
86
201
201+
0.64 ppb
0
36
76
186
605
1005+
2.96 ppb
0
54
101
361
1250
2050+
0.41 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Northfield, Minnesota
Northfield, Minnesota
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AQI 22
Good
4.14μg/m³
PM2.5
17.27μg/m³
PM10
17.80ppb
O3
0.63ppb
SO2
2.95ppb
NO2
0.41ppm
CO
AQI 27
Good
4.79μg/m³
PM2.5
21.27μg/m³
PM10
13.05ppb
O3
0.66ppb
SO2
3.34ppb
NO2
0.38ppm
CO
AQI 27
Good
5.00μg/m³
PM2.5
21.74μg/m³
PM10
12.91ppb
O3
0.65ppb
SO2
3.43ppb
NO2
0.34ppm
CO
AQI 27
Good
5.17μg/m³
PM2.5
22.73μg/m³
PM10
13.24ppb
O3
0.66ppb
SO2
3.38ppb
NO2
0.39ppm
CO
AQI 27
Good
5.15μg/m³
PM2.5
23.53μg/m³
PM10
12.59ppb
O3
0.65ppb
SO2
3.36ppb
NO2
0.42ppm
CO
AQI 27
Good
5.16μg/m³
PM2.5
23.20μg/m³
PM10
13.19ppb
O3
0.68ppb
SO2
3.31ppb
NO2
0.43ppm
CO
Air quality measurements for Minnesota, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Northfield, Minnesota is updated on an hourly basis.
The worst air quality in Northfield, Minnesota was recorded at 03:00:00 on 2026-09-07.
The best air quality in Northfield, Minnesota was recorded at 11:00:00 on 2026-09-07.
The real-time air quality index in Northfield, Minnesota is 22, currently categorized as Good.
The most common pollutant in Northfield, Minnesota is PM2.5.
If the air quality in Northfield, Minnesota is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Northfield, Minnesota at present are 4.493 μg/m3.
The current PM10 levels in Northfield, Minnesota are 22.224 μg/m3.
The current carbon monoxide (CO) level in Northfield, Minnesota is 0.412 ppm.
The current sulfur dioxide (SO2) levels in Northfield, Minnesota are 0.642 ppb.
The current ozone (O3) levels at Northfield, Minnesota is 12.003 ppm.
The current nitrogen dioxide (NO2) levels at Northfield, Minnesota is 2.956 ppb.
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