Worst air pollution Cranbourne South - City of Casey, today and tomorrow
Today (21 September): Air quality in Cranbourne South is fair. AQI, PM2.5, PM10, and NO2 are fair; O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (PM2.5: 30.1/100).
Tomorrow (22 September 2026): Air quality in Cranbourne South is fair. PM10 decreases to good; all other pollutants stay as today. Pollution peaks around 7:00 PM (NO2: 38.4/100). 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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In Cranbourne South, warmer-season humidity around 69% in December can trap particulate matter closer to ground level on stiller days, while average wind speeds of 17 km/h in June typically help disperse pollutants during the cooler months.
Today - 21 September | Pollution peaks at 09:00
AQI:
Fair
30.1/100
PM2.5 (fine particles):
Fair
30.1/100
PM10 (coarse particles):
Fair
22.6/100
NO2 (nitrogen dioxide):
Fair
21.3/100
O3 (ozone):
Good
10.6/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
4.6/100
Levels show the poorest local air quality during the day
Tomorrow - 22 September | Pollution peaks at 19:00
AQI:
Fair
38.4/100
PM2.5 (fine particles):
Fair
30.7/100
PM10 (coarse particles):
Good
19.6/100
NO2 (nitrogen dioxide):
Fair
38.4/100
O3 (ozone):
Good
10.8/100
SO2 (sulfur dioxide):
Good
7.9/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
6.2/100
Other Landmarks in City of Casey
Frequently Asked Questions
Is air quality bad in Cranbourne South right now?
On 21 September 2026, overall air quality in Cranbourne South is fair. AQI is the main air quality indicator at 30.1/100. Pollution peaks around 9:00 AM (PM2.5: 30.1/100).
Will air quality be worse tomorrow in Cranbourne South?
On 22 September 2026, air quality conditions in Cranbourne South will be similar to today, with AQI forecast at fair at 38.4/100. Pollution peaks around 7:00 PM (NO2: 38.4/100).
When is air pollution at its worst in Cranbourne South?
Winter conditions in Cranbourne South average 10.2°C in June, when calm, cool air can allow local emissions to build up. By December, temperatures near 18.0°C raise the risk of ground-level ozone on sunny days. March brings around 61mm of rainfall, typically helping clear the air during the shoulder season.
Are air quality levels in Cranbourne South 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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