Worst air pollution Hazel Crest, today and tomorrow
Today (20 September): Air quality in Hazel Crest is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (NO2: 30.8/100).
Tomorrow (21 September 2026): Air quality in Hazel Crest is fair. All pollutants stay as today. Pollution peaks around 4:00 PM (NO2: 21.4/100). 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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This south Cook County suburb sits near Chicago's historic Calumet industrial corridor, giving it a somewhat heavier traffic and trucking emissions profile than more outlying suburbs. The greenery along the Little Calumet River and inside Kankakee River State Park softens the particulate load somewhat for nearby areas. Short-term spikes can still occur during unusual weather or nearby construction.
Today - 20 September | Pollution peaks at 16:00
AQI:
Fair
30.8/100
PM2.5 (fine particles):
Good
15.7/100
PM10 (coarse particles):
Good
9.7/100
NO2 (nitrogen dioxide):
Fair
30.8/100
O3 (ozone):
Good
17.4/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
4.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 16:00
AQI:
Fair
21.4/100
PM2.5 (fine particles):
Good
16.1/100
PM10 (coarse particles):
Good
9.9/100
NO2 (nitrogen dioxide):
Fair
21.4/100
O3 (ozone):
Good
18.1/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
6.6/100
PM1 (ultrafine particles):
Good
4.0/100
Pollen forecast in Hazel Crest
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Hazel Crest
Frequently Asked Questions
Is air quality bad in Hazel Crest right now?
On 20 September 2026, overall air quality in Hazel Crest is fair. AQI is the main air quality indicator at 30.8/100. Pollution peaks around 4:00 PM (NO2: 30.8/100).
Will air quality be worse tomorrow in Hazel Crest?
On 21 September 2026, air quality conditions in Hazel Crest will be similar to today, with AQI forecast at fair at 21.4/100. Pollution peaks around 4:00 PM (NO2: 21.4/100).
When is air pollution at its worst in Hazel Crest?
Hazel Crest typically sees its highest particulate readings in winter, when heating and traffic emissions linger under calm, cold skies. Summer shifts the concern toward ground-level ozone, as heat and strong sunlight react with local emissions. Legacy industrial sources in the wider Calumet region can still add to local particulate levels. Spring and fall generally stand out as the cleanest stretches of the year, aided by gentler weather.
Are air quality levels in Hazel Crest 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: 20 September 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.
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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