Worst air pollution Downtown Northfield - Northfield, today and tomorrow
Today (9 August): Air quality in Downtown Northfield is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (NO2: 41.4/100).
Tomorrow (10 August 2026): Air quality in Downtown Northfield is fair. AQI worsens to fair; NO2 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 38.1/100). Airmine updates local air quality forecasts four times daily.
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Northfield's citywide air quality pattern extends to Downtown Northfield, the city's compact historic downtown, without a notably different local signature. Local traffic and immediate surroundings can shift day-to-day readings slightly from the citywide figure.
Today - 9 August | Pollution peaks at 00:00
AQI:
Medium
41.4/100
PM2.5 (fine particles):
Good
19.0/100
PM10 (coarse particles):
Good
13.2/100
NO2 (nitrogen dioxide):
Medium
41.4/100
O3 (ozone):
Medium
40.9/100
SO2 (sulfur dioxide):
Good
3.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.2/100
PM1 (ultrafine particles):
Good
13.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 23:00
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Good
13.7/100
PM10 (coarse particles):
Good
9.1/100
NO2 (nitrogen dioxide):
Fair
38.1/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Good
9.6/100
Other Landmarks in Northfield
Frequently Asked Questions
Is air quality bad in Downtown Northfield right now?
On 9 August 2026, overall air quality in Downtown Northfield is medium. AQI is the main air quality indicator at 41.4/100. Pollution peaks around 12:00 AM (NO2: 41.4/100).
Will air quality be worse tomorrow in Downtown Northfield?
On 10 August 2026, air quality conditions in Downtown Northfield will be worse than today, with AQI forecast at fair at 38.1/100. Pollution peaks around 11:00 PM (NO2: 38.1/100).
When is air pollution at its worst in Downtown Northfield?
Seasonal changes shape air quality at Downtown Northfield much as they do across Northfield — winter generally brings the cleanest air, aside from brief inversion episodes during calm cold spells, whereas spring planting and autumn harvest can push particulate levels up with dust and agricultural burning. Farm-heavy surrounding land is the main source of the seasonal dust spikes.
Are air quality levels in Downtown Northfield based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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