Worst air pollution Collie, today and tomorrow
Today (20 September): Air quality in Collie is fair. AQI and PM2.5 are fair; PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (PM2.5: 20.2/100).
Tomorrow (21 September 2026): Air quality in Collie is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (PM2.5: 22.4/100). Airmine updates local air quality forecasts four times daily.
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Coal has long defined Collie, and the town's power stations and mining operations add a distinctive industrial layer to what would otherwise be a typically clean southwest air profile. Dust from mining activity and occasional emissions from power generation are the standout local concerns, layered on top of the region's usual Mediterranean pattern of dry summers and low humidity. Bushfire smoke is also a risk each year between December and March, given the extensive jarrah forest surrounding the town. Away from these industrial and seasonal fire influences, Collie benefits from reasonably good ventilation and generally moderate air quality.
Today - 20 September | Pollution peaks at 10:00
AQI:
Fair
20.2/100
PM2.5 (fine particles):
Fair
20.2/100
PM10 (coarse particles):
Good
15.7/100
NO2 (nitrogen dioxide):
Good
13.2/100
O3 (ozone):
Good
15.1/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.3/100
HCHO (formaldehyde):
Good
3.7/100
PM1 (ultrafine particles):
Good
10.3/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 12:00
AQI:
Fair
22.4/100
PM2.5 (fine particles):
Fair
22.4/100
PM10 (coarse particles):
Good
16.2/100
NO2 (nitrogen dioxide):
Good
17.7/100
O3 (ozone):
Good
14.3/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.3/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
15.1/100
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Frequently Asked Questions
Is air quality bad in Collie right now?
On 20 September 2026, overall air quality in Collie is fair. AQI is the main air quality indicator at 20.2/100. Pollution peaks around 10:00 AM (PM2.5: 20.2/100).
Will air quality be worse tomorrow in Collie?
On 21 September 2026, air quality conditions in Collie will be similar to today, with AQI forecast at fair at 22.4/100. Pollution peaks around 12:00 PM (PM2.5: 22.4/100).
When is air pollution at its worst in Collie?
If you're planning around air quality in Collie, the key window is the peak fire danger period of December to March, the main exception to a clean record. Outside fire season, the reliable afternoon sea breeze keeps the air flushed clean. Timing outdoor activity around this window and checking daily readings helps limit exposure.
Are air quality levels in Collie 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 14:33 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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