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)
52
Moderate
Northfield, Minnesota
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
57.91 μg/m³
0
55
155
255
425
605+
33.86 ppb
0
55
71
86
201
201+
1.22 ppb
0
36
76
186
605
1005+
3.92 ppb
0
54
101
361
1250
2050+
0.33 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Northfield, Minnesota
Northfield, Minnesota
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AQI 49
Good
8.82μg/m³
PM2.5
43.88μg/m³
PM10
32.32ppb
O3
1.27ppb
SO2
3.88ppb
NO2
0.33ppm
CO
AQI 38
Good
7.17μg/m³
PM2.5
32.46μg/m³
PM10
30.13ppb
O3
1.08ppb
SO2
6.58ppb
NO2
0.33ppm
CO
AQI 38
Good
7.10μg/m³
PM2.5
31.98μg/m³
PM10
29.57ppb
O3
1.08ppb
SO2
6.48ppb
NO2
0.31ppm
CO
AQI 38
Good
6.94μg/m³
PM2.5
31.12μg/m³
PM10
29.01ppb
O3
1.06ppb
SO2
7.24ppb
NO2
0.33ppm
CO
AQI 44
Good
7.77μg/m³
PM2.5
35.61μg/m³
PM10
29.59ppb
O3
1.06ppb
SO2
7.06ppb
NO2
0.34ppm
CO
AQI 44
Good
7.51μg/m³
PM2.5
36.57μg/m³
PM10
30.81ppb
O3
1.18ppb
SO2
5.61ppb
NO2
0.34ppm
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 11:00:00 on 2026-04-23.
The best air quality in Northfield, Minnesota was recorded at 02:00:00 on 2026-04-23.
The real-time air quality index in Northfield, Minnesota is 52, currently categorized as Moderate.
The most common pollutant in Northfield, Minnesota is PM10.
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 8.201 μg/m3.
The current PM10 levels in Northfield, Minnesota are 57.908 μg/m3.
The current carbon monoxide (CO) level in Northfield, Minnesota is 0.328 ppm.
The current sulfur dioxide (SO2) levels in Northfield, Minnesota are 1.216 ppb.
The current ozone (O3) levels at Northfield, Minnesota is 33.861 ppm.
The current nitrogen dioxide (NO2) levels at Northfield, Minnesota is 3.925 ppb.
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