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)
38
Good
Northfield, Minnesota
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.79 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.10 μg/m³
0
55
155
255
425
605+
40.68 ppb
0
55
71
86
201
201+
0.86 ppb
0
36
76
186
605
1005+
5.95 ppb
0
54
101
361
1250
2050+
0.41 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Northfield, Minnesota
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AQI 37
Good
3.00μg/m³
PM2.5
14.86μg/m³
PM10
40.45ppb
O3
0.88ppb
SO2
5.99ppb
NO2
0.40ppm
CO
AQI 37
Good
3.20μg/m³
PM2.5
14.27μg/m³
PM10
39.54ppb
O3
0.79ppb
SO2
8.35ppb
NO2
0.45ppm
CO
AQI 37
Good
3.21μg/m³
PM2.5
14.51μg/m³
PM10
40.10ppb
O3
0.78ppb
SO2
8.68ppb
NO2
0.47ppm
CO
AQI 37
Good
3.25μg/m³
PM2.5
14.72μg/m³
PM10
39.80ppb
O3
0.78ppb
SO2
8.62ppb
NO2
0.45ppm
CO
AQI 37
Good
2.86μg/m³
PM2.5
10.45μg/m³
PM10
40.14ppb
O3
0.78ppb
SO2
8.32ppb
NO2
0.42ppm
CO
AQI 37
Good
2.25μg/m³
PM2.5
8.81μg/m³
PM10
39.53ppb
O3
0.82ppb
SO2
6.57ppb
NO2
0.41ppm
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 10:00:00 on 2026-03-09.
The best air quality in Northfield, Minnesota was recorded at 03:00:00 on 2026-03-09.
The real-time air quality index in Northfield, Minnesota is 38, currently categorized as Good.
The most common pollutant in Northfield, Minnesota is O3.
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 2.787 μg/m3.
The current PM10 levels in Northfield, Minnesota are 10.101 μg/m3.
The current carbon monoxide (CO) level in Northfield, Minnesota is 0.408 ppm.
The current sulfur dioxide (SO2) levels in Northfield, Minnesota are 0.859 ppb.
The current ozone (O3) levels at Northfield, Minnesota is 40.68 ppm.
The current nitrogen dioxide (NO2) levels at Northfield, Minnesota is 5.954 ppb.
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