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)
33
Good
Northfield, Minnesota
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.63 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.50 μg/m³
0
55
155
255
425
605+
26.88 ppb
0
55
71
86
201
201+
1.31 ppb
0
36
76
186
605
1005+
9.61 ppb
0
54
101
361
1250
2050+
0.51 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Northfield, Minnesota
Northfield, Minnesota
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AQI 33
Good
5.51μg/m³
PM2.5
30.15μg/m³
PM10
11.53ppb
O3
0.43ppb
SO2
14.74ppb
NO2
0.36ppm
CO
AQI 27
Good
4.51μg/m³
PM2.5
20.30μg/m³
PM10
7.44ppb
O3
0.46ppb
SO2
22.35ppb
NO2
0.34ppm
CO
AQI 22
Good
4.36μg/m³
PM2.5
19.68μg/m³
PM10
7.81ppb
O3
0.46ppb
SO2
22.23ppb
NO2
0.32ppm
CO
AQI 22
Good
4.44μg/m³
PM2.5
20.02μg/m³
PM10
7.94ppb
O3
0.46ppb
SO2
22.21ppb
NO2
0.34ppm
CO
AQI 22
Good
4.46μg/m³
PM2.5
19.61μg/m³
PM10
8.11ppb
O3
0.47ppb
SO2
22.12ppb
NO2
0.36ppm
CO
AQI 22
Good
4.49μg/m³
PM2.5
20.81μg/m³
PM10
7.75ppb
O3
0.55ppb
SO2
20.21ppb
NO2
0.37ppm
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 2025-11-12.
The best air quality in Northfield, Minnesota was recorded at 05:00:00 on 2025-11-13.
The real-time air quality index in Northfield, Minnesota is 27, 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 4.673 μg/m3.
The current PM10 levels in Northfield, Minnesota are 19.808 μg/m3.
The current carbon monoxide (CO) level in Northfield, Minnesota is 0.481 ppm.
The current sulfur dioxide (SO2) levels in Northfield, Minnesota are 0.76 ppb.
The current ozone (O3) levels at Northfield, Minnesota is 10.264 ppm.
The current nitrogen dioxide (NO2) levels at Northfield, Minnesota is 14.166 ppb.
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