Worst air pollution Freeport, today and tomorrow
Today (30 August): Air quality in Freeport is moderate. AQI and NO2 are moderate; O3 is fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 42.2/100).
Tomorrow (31 August 2026): Air quality in Freeport is moderate. All pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 42.6/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Air quality in Freeport is driven mostly by open northern Illinois farmland air — fall ragweed pollen brings the year's sharpest spike. These factors combine to give Freeport a fairly typical seasonal air quality pattern for this part of the country. As with most US destinations, conditions here are best understood by season rather than by a single yearly average.
Today - 30 August | Pollution peaks at 23:00
AQI:
Moderate
42.2/100
PM2.5 (fine particles):
Good
3.7/100
PM10 (coarse particles):
Good
1.4/100
NO2 (nitrogen dioxide):
Moderate
42.2/100
O3 (ozone):
Fair
36.9/100
SO2 (sulfur dioxide):
Good
3.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.4/100
PM1 (ultrafine particles):
Good
3.8/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 00:00
AQI:
Moderate
42.6/100
PM2.5 (fine particles):
Good
8.4/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Moderate
42.6/100
O3 (ozone):
Fair
36.2/100
SO2 (sulfur dioxide):
Good
3.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.2/100
PM1 (ultrafine particles):
Good
4.9/100
Pollen forecast in Freeport
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Freeport
Frequently Asked Questions
Is air quality bad in Freeport right now?
On 30 August 2026, overall air quality in Freeport is moderate. AQI is the main air quality indicator at 42.2/100. Pollution peaks around 11:00 PM (NO2: 42.2/100).
Will air quality be worse tomorrow in Freeport?
On 31 August 2026, air quality conditions in Freeport will be similar to today, with AQI forecast at moderate at 42.6/100. Pollution peaks around 12:00 AM (NO2: 42.6/100).
When is air pollution at its worst in Freeport?
Air quality across Freeport rises and falls with the seasons — spring and autumn tend to bring the cleanest, most stable air, whereas prolonged summer heat waves are when air quality most often dips into unhealthy territory. Fast-moving weather systems typical of the region usually keep pollution from lingering too long.
Are air quality levels in Freeport 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: 30 August 2026 at 14:32 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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